General Qin

"Okay, okay!"

“That’s great, you can still write like this!”

Zhang Cang held a pen and quickly wrote mathematical calculations on the paper, while constantly praising him from his mouth.

After Zhao Tuo's simple explanation, Zhang Cang, who was already proficient in numerology, quickly understood the meaning of those strange symbols.

After a simple experiment, Zhang Cang, a top student, became obsessed with it and was now frantically checking the mathematical formulas brought by Zhao Tuo.

Zhao Tuo smiled faintly on the side.

The mathematics level of the Qin Dynasty was actually not bad. At this time, the multiplication table had already appeared.

Moreover, many of the contents of "Nine Chapters of Arithmetic" and "Zhoubi Suanjing", which were finalized in the Han Dynasty, had become popular in the Warring States Period.

So Zhao Tuo spent a lot of money in order to befriend Zhang Cang.

This time he not only figured out the Arabic numerals, but also wrote down symbols such as addition, subtraction, multiplication, and division, as well as some simple formulas.

Decimals, fractions, negative numbers, equations, inequalities...

As long as Zhao Tuo could remember it, he would write it all down.

He is also afraid that he will have bad memory as he gets older in the future. If he forgets some of these things, it will be a big loss.

Zhao Tuo's mathematics level was actually at the middle school level. In later generations, he might only get a so-so test result, but in this ancient era, he seemed extremely advanced.

Zhang Cang was frantically checking calculations beside him. Zhao Tuo saw that he was immersed in it, so he didn't bother him and took Han Xin to read ancient books in the library.

"The history books of the Six Kingdoms, this thing will never be found in later generations."

Zhao Tuo put down the book recording the history of Zhao State in his hand and sighed.

The current Qin State has just unified the world, and there has been no book burning incident. When dealing with these history books of other countries, the First Emperor directly collected them all into the library for reference at any time. It will not deliberately tamper with or even invent history like some dynasties in later generations.

Looking at the books in front of him that recorded hundreds of years of history of the Six Kingdoms, Zhao Tuo thought of a question in his mind.

Many years later, how will Zhao Tuo be written about in the history books?

"Maybe it will be completely different."

"Either being deified, or being belittled in various ways."

Zhao Tuo shook his head and looked sideways at Han Xin.

He saw that the Huaiyin boy had also taken a history book and was looking at the part describing the war obsessively.

Zhao Tuo advised: "Axin, don't just watch the battles on the battlefield. You should also take a good look at the political battles in the court."

Han Xin raised his head and pursed his lips: "Your Majesty, I am only interested in fighting. Those who write about the court are not interesting."

Looking at Han Xin's aggrieved look, Zhao Tuo shook his head and said to himself: "This silly boy, even if he is victorious in every battle and doesn't understand the court, he will easily die."

While Zhao Tuo and Han Xin were chatting, Zhang Cang, who had been burying his head in checking the formulas, threw the pen on the case and shouted: "Okay!"

Zhao Tuo looked sideways and said with a smile: "The historical calculation under the pillar has been completed. Are there any errors?"

"There is no fallacy. If you use these numbers given by the monarch to do the calculation, it will be twice the result with half the effort. It is extremely easy! There are also these decimals, fractions and other things. I only took a rough look and already felt that this is really true. It's a wonderful method, you should study it carefully when you go back."

As he spoke, Zhang Cang looked at Zhao Tuo with admiration and said, "Junhou, you are really a math genius!"

"It's not a genius, it's just a trivial idea."

Zhao Tuo waved his hand modestly.

Seeing that Zhang Cang had the idea of ​​further questioning.

In order to avoid trouble, Zhao Tuo was also afraid that the other party would keep asking questions. In the end, he said too much and exposed his secrets, so he simply adopted a simple and crude method.

"Actually, I first read these numerical symbols on the fragments left by Gongshuzi. I remembered them in my mind without thinking much about them at the time. After reading these books in the past few days, I found that there were some troubles in calculations, so I remembered them, and then I Gongshuzi modified and deduced the numerical symbols left behind, and finally came up with the current numbers."

Zhao Tuo said with a smile.

Gongshu ancestor, the origin of all things.

It has a great reputation and high credibility, which is a perfect shield.

As expected, Zhang Cang looked relieved after hearing Zhao Tuo's explanation.

Gongshuzi Luban was a world-famous craftsman.

Since he is a craftsman, he must be very knowledgeable in numerology. He came up with these simpler and more convenient numerical symbols to assist his carpentry skills. This is completely reasonable and has no trace of counterfeiting.

"Gongshuzi not only knows how to attack cities with weapons, but also knows how to farm, and he can also make paper. Now he is even unrivaled in the art of mathematics. He is truly a god. I wish I could travel hand in hand with such a person!"

Zhang Cang sighed sadly, looked at Zhao Tuo again, and praised: "The prince can improve and complete the public transport figures, and he is also a capable person in this way."

Public transmission figures?

The corners of Zhao Tuo's mouth raised slightly.

This new type of mathematics has the authoritative endorsement of Gongshuzi, so it will be easier to promote it, and Zhao Tuo can also take credit for improving Gongshu's numbers.

"Perhaps my name, Zhao Tuo, can be added to future mathematics textbooks."

Zhao Tuo, a great mathematician in ancient China, improved and popularized the public numbers and made great contributions to the development of mathematics. He is the founder of modern mathematics and a figure that can never be avoided in the history of mathematics development. .

Thinking of these words, Zhao Tuo couldn't help laughing.

He turned to Zhang Cang and said: "There may be some flaws in this figure when it was originally created. Zhuxia Shi has always been knowledgeable. Please help me check the calculation again. If there is no problem in the end, we can present it to the emperor. In order to promote the world, perhaps these numbers will be called Qin Shu in the future, and the contribution of Zhu Xia Shi will be indispensable."

"It's easy to talk about."

Zhang Cang quickly agreed, not to mention whether he had any credit for this matter or whether he could leave his name. Just because this was a research that he was very interested in was enough to attract all Zhang Cang's energy.

He thought for a moment and then worried: "It's just that digital promotion is very troublesome and almost overturns the previous counting text. Will the emperor agree?"

Zhao Tuo laughed, walked to the table, picked up a pen and wrote two numbers on the paper. .

"You see, my Da Qin Shui De Shang Liu, if you use the original number to look at it, it doesn't make any sense. But if you use the new number to write it, it is 6, and then write it upside down, it is 9."

"9 is the ultimate number. When 6 reaches the extreme, it is 9!"

"Tell me, does this new type of number indicate the longevity of our Great Qin Dynasty?"

"The emperor will definitely adopt it."

After hearing Zhao Tuo's confident words and looking at the 6 and 9 on the paper, Zhang Cang reached out and wiped the sweat from his face.

This martial artist's mouth is incredible!

With this thought in his mind, Zhang Cang's face showed an eagerness to try.

Although he was only a minor official in the history of Zhuxia, he had studied under Xunzi and was Li Si's junior brother. He had seen many scenes and his heart was very strong.

If Zhao Tuo used his position as a prince to make friends with him, Zhang Cang might be surprised or flattered, but he would definitely be wary. I guess Zhao Tuo, the aloof Lunhou, came to befriend him deliberately for some unknown purpose. He would never really be friends with Zhao Tuo.

But Zhao Tuo's new mathematics dispelled Zhang Cang's vigilance.

Why did the martial arts lord come to him? It was because he heard about Zhang Cang's reputation for being good at calculations and proficient in numeracy. He came specifically to have academic exchanges with him. His purpose was very pure. He had no other bad intentions at all, so there was no need to be too suspicious.

After all, it's impossible for Marquis Wu Gong to come up with a new set of numbers as a stepping stone just to make friends with him, Zhang Cang, right?

In such a situation where he relaxed his vigilance, Zhang Cang discovered the merits of the martial arts lord who does not regard others with dignity, has a gentle and friendly personality, and is also knowledgeable, and he immediately fell in love with him.

After some conversation, the two quickly became good friends, and Zhang Cang even took the initiative to invite Zhao Tuo to his house.

When it was getting late, when Zhao Tuo came out of the censor's library, he couldn't help but sigh in his heart: "This is to do what you want!"

"Now that Zhang Cang is on the line, when we get to know each other well in the future and become one of our own, we can look for opportunities to recommend him. With these talents in charge of the government, this Great Qin will surely prosper."

A smile appeared in the corner of Zhao Tuo's eyes, feeling that everything in this country was developing in a good direction.

Perhaps to add to the joy, within a few days, news came that made Zhao Tuo happy.

General Ren Xiao, who had won a great victory against the southwestern barbarians, was about to escort the captives from the southwestern barbarians to Xianyang in triumph.

Ren Xiao is back, and Chen Ping, the counselor who followed him to attack the southwestern Yi, will naturally come back.