Datang: The prince of salted fish was overheard by Li Er

After making up his mind, Li You decided not to leave.

He wants to wait here, and after Wang Xiaotong finishes, have a good talk with him.

He wasn't worried at all about the bond issue.

The printing plate from the previous bond issue is still there, and with a little adjustment, it can be used to print new war bonds.

As for the distribution part, Li You was not worried at all.

A measly 100 million bond has already been subscribed for a lot in the hall just now. Presumably, as soon as the news is released, the remaining part will definitely become a sweet pastry that everyone is rushing to buy.

At that time, we may have to introduce lottery and purchase restrictions.

Li Anren was also a little surprised by Li You's decision, he didn't expect Li You to come and not leave.

Out of strong curiosity, Li Anren also stayed.

The two waited for more than half an hour, and saw Wang Xiaotong, who had been standing there, suddenly moved.

I saw him writing like flying, writing and drawing on the paper non-stop.

About half an hour later, after Wang Xiaotong finished his calculations, he sighed and sat down exhausted.

Li Anren hurried forward, checked the content of the calculation, and said puzzledly: "Teacher, there is nothing wrong with your calculation, why are you sighing?"

Wang Xiaotong just came back from his own thinking and did not find that Li You was there, he continued to sigh and said: "An Ren, you have read the calculations of the teacher, you should be able to see the method used by the teacher."

Li Anren recalled it carefully, then nodded and said: "Understood, this is a system of linear equations in two variables."

Hearing this word that was completely unfamiliar half a year ago, Wang Xiaotong sighed again and asked, "An Ren, do you know why the teacher has thought about this question for so long?"

This question really stopped Li Anren.

This time, Wang Xiaotong has seen the problem of calculation, and it is not too difficult in his opinion.

According to Wang Xiaotong's linear equations in two variables just now, theoretically speaking, it can be solved very quickly.

Immediately, Li Anren thought of a possibility, that is, Wang Xiaotong is not very familiar with the new algorithm of binary linear equation.

Although he thought of the answer, Li Anren didn't say it, but shook his head instead.

Seeing Li Anren shaking his head, Wang Xiaotong told the truth.

"An Ren, in fact, the reason why it took me so long to solve this problem this time is not because the teacher is not proficient in linear equations in two variables, but because the teacher is thinking that if we use our previous method, this problem should be solved. How to solve it."

"However, it took two days. Although the old method can also be solved, the difficulty of thinking and calculation is much higher than the new method."

"An Ren, you said that what the teacher has been studying for so many years is wrong?"

After getting in touch with modern mathematics, Wang Xiaotong would often ask himself this question.

In his opinion, the problems of previous dynasties have become extremely simple in front of equations, not to mention people who are proficient in arithmetic, even those who have just learned equations can easily solve them.

Such a result plunged Wang Xiaotong into deep self-doubt.

On the one hand, he earnestly studied various calculation methods of modern mathematics, on the other hand, he kept comparing with the algorithms he was proud of in the past.

But in the face of various problems, his own method failed miserably without exception.

During the recent period, the new school was on vacation, and under the leadership of Li Anren, the students who were originally mathematics returned to mathematics, and returned to Wang Xiaotong's class.

However, after some lectures, Wang Xiaotong felt more and more confused.

He didn't understand what's the use of teaching these backward things of his own to these students, and what's the use of the existence of mathematics.

With strong reluctance, Wang Xiaotong started to try again.

In his view, as long as he can use past methods to find a better way to solve problems than equations, then arithmetic is still meaningful.

But this time, he failed again.

Li Anren naturally couldn't answer Wang Xiaotong's question.

Seeing Li Anren's blank expression, Wang Xiaotong seemed to understand everything.

However, when Wang Xiaotong was secretly sad, Li You spoke.

"Dr. Wang, you are wrong!"

Only then did Wang Xiaotong see Li You coming.

Seeing Li You, Wang Xiaotong was absent-minded for a moment, and then a complicated expression appeared on his face.

For Li You's new learning, Wang Xiaotong undoubtedly admired it extremely, but the impact of the new learning on traditional mathematics also made Wang Xiaotong feel desperate from time to time.

After a long time, Wang Xiaotong came out of his own thoughts, and asked, "I don't know what the king of Yan wants to do with me today?"

Li Anren was about to say that he had a question to ask, but he heard Li You said: "This king is here to invite Dr. Wang out of the mountain to be the head of the securities department."

"Come out? Securities department?"

"What department is that?"

Before Wang Xiaotong could speak, Li Anren on the side rushed to ask.

"This is a new department, under the household department..."

This time, before Li You finished speaking, Li Anren refused: "My teacher won't go!"

"Don't think that the newly learned modern mathematics surpasses arithmetic, so arithmetic can be revoked!"

"We're staying here and we're not going anywhere."

"In vain, I chose to stay in Xinxue for the next semester. I didn't expect you to be such a person, King Yan. Now I want to change my mind..."

But this time, before Li Anren finished speaking, Wang Xiaotong interrupted him.

"Don't get excited, An Ren, let King Yan finish the sentence."

Then Wang Xiaotong bowed slightly and said: "King Yan, An Ren is quite impatient, please don't argue with him."

Li You nodded and continued to introduce this department.

After the introduction, Li You looked into Wang Xiaotong's eyes and said, "Dr. Wang, I sincerely invite you to be the first head of the securities department. This position is in great need of a master of mathematics like you."

If it was in the past, Wang Xiaotong would definitely reject a similar suggestion immediately, but this time he was a little confused.

"Yan Wang, why do you think of me?"

"In my opinion, the mathematics teacher in Xinxue is several times better than me in calculation ability."

Unexpectedly, Li You shook his head and said, "Dr. Wang, although the new teacher has an advantage in calculations, his accomplishments in calculations are not comparable to yours."

"Don't you always feel that your arithmetic is not as good as the equations taught by Xinxue?"

"Actually, you are completely wrong."

"Dr. Wang, please let me take the liberty of asking you a question."

"In your mind, what exactly is mathematics? Why do you want to study mathematics?"

Faced with this question, Wang Xiaotong closed his eyes and fell into deep thought.

At this moment, he seemed to have returned to when he was young, and the teacher in the school asked the same question.

With thinking, Wang Xiaotong's memory gradually became clearer.

He didn't open his eyes, and muttered to himself: "Mathematics is the science of returning to the basics, the knowledge of describing the essence of all things with numbers and symbols and using them to reproduce."

"And I will use arithmetic to make Datang even stronger!"