In the years of ancient traders

Although Yang Jian didn't want to marry Song Shu, he obediently paid for it.

With the money of fifty frames, he purchased public farming frames for fifty villages.

Those racks were sent out one by one, and the villages received them every day. The villages who received them were full of joy, and the spring plowing became more vigorous.

Cai Erlang and Jiang Wulang built a heated kang with fluted walls all winter. After the beginning of spring, the weather became hotter. Except for a few families who were preparing for the coming year, their work was much less.

If they couldn't build a fire wall and kang, they found some well-off families along the way to help them plow the spring, and they could earn a few pennies.

They were lucky, and after doing a few businesses, they came to a field of rich households.I heard that the rich man's surname is Zhang, and he lives far away. His distant relatives are in charge of some tenants here.Due to lack of cattle for spring plowing, the distant relative wanted to find some help.

Jiang and Cai have great strength, so they got the job as a matter of course.

However, within two days of working, the distant relatives of the rich family settled the wages with them: "I'm sorry, my cousin sent two farming frames, and I have brothers and sisters here." After the man finished speaking, he directed The tenants went to use the farming frame instead.

Cai Erlang swung his arms around, the blisters from the plow on his shoulders were still there, what is this generation of plow frame?

He took Jiang Wulang to see what happened. There was a human-shaped frame at each end of the field, and the middle was connected with a rope. For some reason, the person next to the frame pulled the wooden handle on the pulley and plowed. Then he moved by himself.

"This thing is amazing, Jiang Pang, have you seen it?" Cai Erlang patted Jiang Wulang on the shoulder excitedly.

Jiang Wulang was also covered with blisters on his shoulders, and he jumped up in pain and swears loudly. Cai Erlang stopped after apologizing, and shook his head: "I haven't seen that either."

After they left, they turned back to the villages where they had worked before, trying to try their luck again, but found that the farm tools were also found in those villages.When I asked my fellow villagers, I found out that it was sent by Song Shu.Several villages that had been sad before became happy. Their land could never be plowed, and they had no money to hire strong laborers. If it weren't for this pretension, many of the fields would have been abandoned this year.

"Pang Liulang, has the wheat been ground?" Cui Wuniang came out of the stove of the mantou workshop, where three baskets of bean paste steamed buns had just been steamed.

"Soon." Pang Liulang added unhulled wheat to the stone mill while driving the donkey pulling the mill.

Pang Liulang started doing small businesses in his teens. He couldn't read big characters, and he couldn't read a contract with someone. He was tricked by others, so he only did some small business along the street, and didn't dare to accept big orders.

When the school in Xianghe Village was about to open, most of the vendors who were with him were not very interested.They can already earn a lot by selling silk quilts in Yuexing City every day, and they don’t need to work extra hard to read and write. Ninety-nine percent of the farmers and vendors around them are illiterate, and they live in the same way.

Pang Liulang couldn't explain it to them, so he simply ignored him, and ran to Song Shu to sign up.

Song Shu's school does not stop repairing, but it needs to be compensated by work.He was assigned to the Steamed Bread and Soybean Oil Factory, and he only needs to work for one day every ten days.The work of making steamed buns or pressing soybean oil requires skill, so naturally it is not his turn to do more laborious work such as grinding flour, chopping firewood, and carrying soybean oil.

Every evening, when he came back from work or business, he and more than 20 other people gathered in the yard of Mantou Soybean Oil Factory to listen to Mr. Yan's lecture.

Among the more than 20 people, there are more Xiaolangjun.For example, the two sons of the Shi family were brought to the school by their aunt, as well as Tan Li from the Tan family and Ah Xiao from the village chief's family.Most of these young gentlemen are family members who do the work for them and let them come to study well.

Pang Liulang, who became a monk on the way, lamented the good luck of the young gentlemen. Although they were born in troubled times, they met people like Song Silang, and they had the opportunity to read and write at a young age.

When announcing the opening of the school, although Song Shu said that men, women and children were welcome, there were very few women who actually came, and only Cui Wuniang came every day.In addition, it is the Song family's Sanniang, Wuniang, Liuniang and Cheng Erniang.They were a little hesitant, but Song Shu insisted and called them all.Song He also accompanied Cheng Erniang every day.Qilang was still young, and followed his brothers and sisters who seemed to understand but didn't know how to listen.Song Anan never appeared.

Yan Zhuo's lectures were very interesting, easy to understand, and often had classic words, which made everyone laugh.

The school not only teaches literacy and writing, but also teaches some simple arithmetic.Yan Zhuo learned a lot about Arabic numerals and modern mathematical symbols from Song Shu. He directly used these professors in the school. These students were new to them. They felt that these symbols are simple and convenient, and learning them is much easier than recognizing characters.

"Excuse me, everyone, what is 32 plus nine?" Yan Zhuo asked.

The people below snapped their fingers, and those who looked at the sky looked at the sky.Liu Niang's ten fingers were all used up, but she had no clue.Wu Niang looked around, frowned slightly, blinked, showing a little doubtful expression.

Yan Zhuo silently counted to thirty, but no one answered, somewhat frustrated.I had to say again: "How much is 32 Wen plus nine Wen?"

"41 coins!" Pang Liulang took the lead in shouting.

"Then, since 32 Wenqian plus 41 Wenqian equals 32 Wenqian, how much does [-] plus [-] Wenqian equal?" Yan Zhuo was persuasive.

"41." Wu Niang said softly.When Yan Zhuo first came up with the question, she figured it out. It took almost no time, but the people around were so strange that they counted with their fingers for a long time.

As soon as Wu Niang said, Pang Liulang and others suddenly realized, and slapped their thighs: "Hey, I've been thinking about buying and selling every day. From now on, let's do arithmetic problems and read the numbers directly into copper coins. Guaranteed to calculate quickly!"

Tan Li sat in the back and didn't speak, Ah Xiao was still snapping his fingers, Liu Niang took out a fried dough stick from her bosom, San Niang saw it and confiscated it.

After the class in the evening, everyone went back to their respective houses for dinner. Yan Zhuo's favorite time was after dinner.Song Shu was so busy during the day that he didn't touch the ground. Recently, he often had to meet with the heads of the villages and the township officials for the work of substituting the tillage frame. He didn't have time until the evening.

"Song Silang, tell me about the usage of XY, and the geometry problem is quite interesting." After dinner, Yan Zhuo followed Song Shu back to the main room like a tail.

When he was left as a teacher, Song Shu thought that teaching him Arabic numerals and some symbols such as addition, subtraction, multiplication and division would be all right, and he thought he had picked up a big deal.But who knew that Yan Zhuo was smart and eager to learn, Song Shu talked more when he got excited, and even discussed with him the problem of chickens and rabbits sharing the same cage.

This question comes from the "Sunzi Suanjing", which can be described as a famous question in ancient and modern times.

The question asks, there are pheasant rabbits in the same cage today, with 35 heads on the top and 94 feet on the bottom, how many pheasant rabbits are there?

Yan Zhuo's algorithm takes advantage of the fact that the number of feet of the two animals is different. Divide the number of feet by two and subtract the number of heads, leaving only the number of rabbits with four legs. Finally, it is concluded that there are twelve rabbits and chickens. There are 23 of them.

There is nothing wrong with this algorithm, it was solved in this way in ancient arithmetic.But Song Shu felt itchy for a while, and made an algebraic equation, setting the number of rabbits to X, and finally got the same answer as Yan Zhuo.

As soon as the algebraic method came out, Yan Zhuo was dumbfounded.

Chinese characters are different from letters. Each character and each radical is meaningful. It is difficult to make meaningless references like letters.Therefore, in terms of algebra, the development of the Chinese cultural circle is inherently insufficient, and there is no concept of algebra in this world.

Such a concept that has not yet been produced but has a wide range of uses drives Yan Zhuo crazy.He has a deep research on mathematics, and he saw the potential of this algebraic method at a glance, and immediately felt like a treasure, and urged Song Shu to explain it to him.

Poor Song Shu, a liberal arts student who hasn't touched mathematics in 800 years, in order to teach him, fell asleep with his middle and high school mathematics textbooks every day, and the circles under his eyes almost fell to his lower lip.

"Song Silang, look, I did the calculations last night." Yan Zhuo unfolded a large piece of paper, on which the calculation process was densely written with a brush, and there were a few sketches, "I think the one you told me yesterday There is something wrong with the solution to the problem, it..." He got carried away as soon as he got into mathematics, and he didn't even notice that Song Shu had already hid on the bed, and Song Anan was standing in front of him.

"Sleep." Song Anan said, grabbing Yan Zhuo by the collar and dragging him outside the door.

"Wait, I haven't finished talking yet, this question..." Yan Zhuoqi refused to give up.

"Yizhi, it's too late today, let's discuss tomorrow!" Song Shu's words came from inside, and before the words finished, Song Anan had already closed the door.

Yan Zhuo looked at his calculation paper, feeling a little lonely, and finally calculated it, why didn't he take a look?Since the paper shop started operating, he no longer lacks paper for calculations. He does calculations every day, and he doesn’t even want to sleep. Yesterday Song Shu told him a very interesting geometry problem, but the auxiliary line for the solution was not the best. Yu, he found another method, which is faster to solve.

Yan Zhuo hugged his calculation paper and went back to his room a little lonely.

"Sleep." Song Anan closed the door and said to Song Shu who was sitting on the bed.

"Be more polite next time, he is just a weak scholar, he should be scared." Song Shu said while unbuttoning his coat.

"Hmph." Song Anan snorted coldly.

"Don't be angry, I know you're doing it for my own good. By the way, tomorrow I'm going to Sangyuan Village, will you accompany me?" Song Shu took off his coat and trousers, got into the quilt and prepared to sleep.

"En." Song Anan said, climbed up the ladder a few times, and lay down on the upper bunk.

Song Shu said good night, regardless of whether Song Anan would return, he closed his eyes and got ready to sleep.When he was about to fall asleep, he suddenly heard someone say: "Don't call Yizhi again."

"Did you say what you said yesterday?" Song Shu asked Anan early the next morning.

He was about to fall asleep yesterday, when he suddenly heard someone say "don't call Yizhi again", which shocked him a lot.At that time, he called Song Anan twice, but there was no response. He thought he was hallucinating.

When he got up in the morning, the more he thought about it, the more wrong it became. He must have heard that. At that time, there were only him and Song Anan in the room. It couldn't be his dream, it must be what Song Anan said!

Song Anan actually said six words?

Song Shu wanted to set off firecrackers to celebrate.

It's a pity that Song Anan refused to admit it. When Song Shu asked him, he pretended he didn't hear it, and shook his head if he couldn't escape.

They made a fuss until they entered the east room for breakfast, but Song Anan didn't reply.

"Morning, Shiro." Yan Zhuo now lives in the east room, and eats with the Song family every day. When he saw Song Shu coming in, he immediately greeted him.

"Morning, Yizhi." The ancients had the habit of calling each other's characters to express closeness and respect. Song Shu rarely met someone with characters, so he went to do as the Romans did.

"Don't shout." Song Anan tugged at his sleeve.

Yan Zhuo went to help Sanniang and Wuniang prepare meals, but Song Shu covered his mouth and laughed when he didn't hear it: "It really is you."

Song Anan's expression was a little distorted.

Afterwards, Song Shu asked him why he said this, but he refused to obey, his mouth was like a clam shell.Song Shu was going to Sangyuan Village after dinner, and asked him if he would go, Song Anan still didn't speak, but got into the car in the blink of an eye.

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