Before the invention of the calculator, the logarithmic slide rule was a daily calculation tool for engineers.

The most peculiar thing, or a little bit of trivia, is that calculating multiplication and division in this era does not rely on multiplication formulas, let alone formulas.

But rely on logarithms!

A few days ago, many people praised Big Brother Mao Xiong’s mathematical genius. Using only a few simple diodes and a series of mathematical magic equations, he could complete calculations that beautiful girls can complete with advanced chips!

This is true.

And this slide rule is actually this kind of magical mathematical magic!

When using a slide rule to calculate multiplication, such as AXB=C,

The principle used is lgA lgB=lgC!

lg is the abbreviation for logarithm.

First use a ruler to pull out the value of lgA, then pull out the value of lgB, and then add the two to get lgC,

Then pull the logarithmic slide rule scale to the lgC position, and you can immediately see the value of C!

Another example is division. If A/B=C, then lgA-lgB=lgC must be true, and the division as above is simplified to subtraction.

This is the mathematical magic of the legendary Big Brother Bear!

Li Sanbiao was also trained in the magic mathematical slide rule when he was in college, and it still had strong vitality in the 1980s.

There are many slide rules, and some can even convert height and weight, which are still used today.

Of course, no matter how awesome Big Brother's mathematical magic was in 1981, it is still outdated now.

And now Big Brother, the whole country is obsessed with programmable calculators, and he no longer uses mathematical magic.

Big Brother’s understanding of computers is that programming is more important than computer applications. He believes that a calculator is enough to learn programming. Therefore, there are many programmable calculators, reaching millions, mainly used for children’s learning.

The calculators used by Longguo engineers in the 1980s were at most Casio's fx35 scientific calculator, and even lower-end Sharp calculators. These calculators only had general calculation functions.

Programmable calculators were sold to Longguo probably after 1995.

However, Long Country is too poor, and many engineers, especially technical secondary school technicians, simply cannot afford a calculator.

Therefore, in October 1981, a book called "Using the Slide Rule" was published, which was very popular at the time!

As for business, forget about rural areas, it’s all about fiddling with abacus beads.

Everyone is still proud of Zhang Binggui in the department store, who can calculate the abacus faster than foreigners' calculators.

Li Sanbiao felt quite sad when he thought about it. Of course it couldn't be like this this time.

Chief engineer Lao Zhang was flipping through the information when he saw Li Sanbiao and hurriedly stood up to greet him.

He said with great sadness and sadness:

"Xiao Li, no, Manager Li, look, our construction of the four modernizations has been delayed for many years, and our calculation tools are at least ten years behind those of foreign countries. Can your factory office approve it quickly?"

Li Sanbiao said disdainfully: "It's just a calculator. What's the big deal? Let's just work hard and find a way to produce it ourselves."

Mr. Zhang was speechless, took off his glasses, and after a while he said: "Produce it yourself? Xiao Li, I have to criticize you. I can't brag anymore. You have to respect science..."

Li Sanbiao listened patiently and then said: "Mr. Zhang, you misunderstood. When I was in college, um, I came into contact with Big Brother's programmable calculator. I have done some research on calculators. Give me half a day and I will get you a design.

Come out."

I heard that Li Sanbiao could make a calculator, and the chief engineer was very angry.

I think Li Sanbiao is too dishonest!

In the past, he always felt that the previous college students who were workers, peasants and soldiers had a poor foundation, were difficult to deal with, and loved to cling to groups.

The college entrance examination has finally resumed. I didn’t expect that the first batch of college students to graduate would be so arrogant!

Although I heard that Li Sanbiao made the electronic watch by himself

But in the opinion of the chief engineer, it was just opportunistic, putting together the chips from Factory 878 and the LCD screen from Factory 774, and just screwing them together.

What's more, Li Sanbiao was among the seven or eight college students assigned at the beginning of the year. The factory director was the first to ask his opinion on how to distribute them.

At first, he thought that when he came to Li Sanbiao, he was just studying construction electrical and had nothing to do with electronics, so he was directly handed over to the factory office.

How could someone who had been eliminated during his selection process become the manager of the first branch in just a few months?

From the bottom of his heart, the chief engineer could not accept the fact that he had gone astray.

He didn't have much favorable impression of Li Sanbiao, and he didn't give him a good look.

The chief engineer was so angry that he called A Yuan aside and told her not to look for Li Sanbiao anymore. He took his note and gave it directly to the factory director to ask for money, and also sued Li Sanbiao.

A Yuan was a little hesitant. He had just eaten someone else’s White Rabbit toffee, and he was seen cuddling and cuddling him on his bicycle.

Although it was not my intention, I was too embarrassed to sue him right away.,

What's more, he also thinks Li Sanbiao looks good...

Li Sanbiao saw A Yuan's embarrassed look and said with enthusiasm:

"Chief Engineer, you asked A Yuan to frame a good person. Aren't you making things difficult for her? Give me a workbench and I will design a calculator for you this afternoon!"

The other engineers stopped their soldering irons and looked at Li Sanbiao in disbelief.

The thought in the minds of countless people is: This person is too arrogant.

Wasn't it just that he hooked up with the factory director's daughter, and then the factory director made him the manager of the first branch for personal gain?

As for the creation of electronic watches, it also made the institute lose face. After all, research and development is their business, but Li Sanbiao did the production himself without asking any questions, and he ignored them during the whole process!

Now, I am showing off my skills on the calculator again and greeting our institute in person!

Li Sanbiao knows what they are thinking.

These people can be considered the top electronic technicians in the Dragon Kingdom, and many of them have thought about it in private.

I also disassembled a Japanese calculator.

However, due to the incomprehension of the design principle, it was never completed.

If you want them to believe that any layman, even a college student, can imitate a calculator, no one will believe it.

Fortunately, intellectuals these days are already very measured and don't say anything that shouldn't be said because they don't want to cause trouble.

Although some engineers with bad tempers often make sarcastic remarks to some workers who are slow-minded, so that the workers cannot get off the stage.

But what is Li Sanbiao's identity? These engineers are still quite afraid and dare not ridicule him face to face.

Of course, even if you don’t say it, you will be dissatisfied in your heart.

Li Sanbiao knew very well about resurrecting his life, and he still had some foresight.

Generally speaking, scholars are just a little aloof and look down on others, but they don’t have any bad intentions to harm others.

Except for the college student who was assigned with A Yuan.

The young engineer holding the drawing board is named Xu Zhian. He went to the same school as A Yuan. He graduated from a prestigious university and has always had a high profile. He also obviously has great ideas about A Yuan!

After being trained in the factory for a long time, he was the first to be assigned a room, but he was also the first in the factory to go abroad.

Before leaving, he said a lot of discouraging words to others, leading a large number of people to resign, causing serious losses.
Chapter completed!