The other side.

Zhang Feng just explained the importance of geometry and mathematics, as well as the calculation skills, and then was "invited" out of the classroom by Cheng Chumo and others who couldn't wait.

At this time, there are only a group of students left in the classroom,. Staring at his verbatim record on the papyrus, what Zhang Feng just said.

After looking at the last arithmetic problem of calculating the sum of the areas of square objects, everyone was silent.

Carefully taste the mystery of mathematics.

Before, they were only exposed to the simplest multiplication table, division table, addition and subtraction and so on.

They thought that they were familiar with the mystery of mathematics, but after a class by the Dean, they suddenly found that they didn't count anything here!

In any place except on the mountain, as long as they wear the clothes of white deer academy, it is simply a pass. They almost don't have to queue up to get in and out of Chang'an and major restaurants and teahouses,.

Even in the teahouse, no money!

So that all of them are still a little floating.

what is it?

This is a symbol of identity!

This is the face earned by the Dean!

It is the pride of everyone in Bailu Academy.

But

Today's class made them recognize themselves. In fact, they are nothing

Even at this time, the old scholar looked at the arithmetic problem on the blackboard with a dignified face and indulged in it.

At this point.

It's on one side of the teaching building.

Chumo invited Zhang Feng here. He he smiled at Zhang Feng and rubbed his hands.

Zhang Feng was so frightened that he thought these goods were going to kill people.

"What's wrong with you?" he asked hurriedly

"Yes, yes, yes!"

Chumo nodded repeatedly and said, "now, the water wheel is basically done, but the water wheel needs to change an axis almost every day. That's wrong!"

"However, we thought of many ways, and even changed into iron bars or steel bars. Although it works, it won't last for a few days..."

"So, you took the opportunity to find me here?" Zhang Feng asked contemptuously.

Although Cheng Chumo was a little unhappy, he didn't dare to annoy Zhang Feng at this time. He could only recognize it by pinching his nose, but Du Gou was unwilling. As soon as he picked up a note he had made, he argued with Zhang Feng.

Du Gou is famous for his nagging mouth.

That terrible mouth skill can even make people feel terrible.

At least Chumo can't stand it. Even Chengqian can't stand it.

At this time, Du Gou made a move, which was also discussed by several people.

Once Zhang Feng didn't say it, Du Gou took the shot. At this time, Du Gou and Zhang Feng were arguing happily.

Several people tried to hold back their smiles, smoking and silently calculating the time in their hearts to see how long Zhang Feng could last.

Sure enough, without waiting for a meal.

Zhang Feng was finally defeated.

"Well, brother, I've convinced you. Is this waterwheel almost OK, but there is a fatal weakness, that is, the transmission..."

Before Zhang Feng finished, Du Gou hurriedly asked, "Fengzi, what is this transmission?"

Wei Shuyu couldn't help asking: "Yes, Feng Zi, you're telling the truth. You just say this and that. Who won't? Even if I say this, I'll say it! We've spent countless time day and night, and we still can't handle this thing at that time. Just turn your mouth and say this and that. You'll tell me how to solve it tomorrow Delivery is coming. What do you want our brother to do? "

Zhang Feng was angry and funny when he heard the speech.

But then he knew that if he laughed, he would be beaten up every minute.

Zhang Feng had to sigh and said, "do you remember the course I taught you the night I just moved to the villa?"

So, the faces of several people turned red in an instant.

Slowly, he got up.

Is that everyone dares to face Zhang Feng.

No, doodle.

Du Gou frowned, turned over the book in his hand, and then said, "Fengzi, this thing seems to be some misunderstanding. At the beginning, I remember clearly in this book. You said the way of power transmission and how to form hydrodynamic power! Didn't you say anything about the manufacture of waterwheel?"

Zhang Feng patted his forehead. He looked at Du Gou curiously and took a look at the small book. Hao Ran found that the goods were actually taking notes.

Shit.

Good man, who keeps a fucking diary?

This goods, actually write a diary?

But at this time, even if he wrote a diary, it doesn't hurt. After all, he really said it.

Zhang Feng pointed to his notebook, then asked Chumo to come over and said, "come on, come and have a look. I don't believe it. Don't you remember this?"

"Damn it, now I let you make this waterwheel, didn't I let him turn?"

"This can turn. Is it a power unit?"

moment

Several people suddenly became cheerful.

Chumo slaps his forehead excitedly and yells, "Damn it, that's what happened!"

"No wonder I've turned this thing upside down and haven't seen it before. It's because of this, lying trough and punch. You fucking said that this thing... I believe your evil!"

The crowd suddenly reacted at this time,.

It was the boy who said that the manufacturing principle of the waterwheel was quite complex. It was far from a power problem, but a manufacturing process problem

If they had known that this was a pit goods, damn it, they would have got it out. Why should Feng Zi see such a joke at this time?

Several people looked at Zhang Feng's speechless look, and then looked at Chang sun Chong, who was going to leave. Everyone was angry. Du Gou blew his beard and stared angrily, put the little book in his pocket and shouted, "Damn it, beat him!"

“……”