After a few minutes of excitement, the same question came to my mind.

“7812378*7812378=…”

???

??

Still can't do it in one second, what's going on?

As... ahem, a genius should not be difficult for such a problem!

Zhang Yuan frowned, and a multiplication vertical pattern appeared in his mind. He stumbled for half a minute before the final result jumped out.

“61033250014884.”

It's OK, it's done.

After thinking about it carefully, a trace of suddenness appeared on his face.

"So that's it... It turns out that when I encountered this kind of problem, I directly solved it by computer, and the computing skills were greatly degraded. If I didn't think about it with my brain, even a genius wouldn't be able to jump out of the answer immediately..."

"The calculation is slow now, just because I am not proficient enough and have not mastered relevant skills. If I use mental arithmetic for a long time, I will definitely get better slowly."

the next day……

Zhang Yuan woke up sleepyly and rubbed his confused head.

Maybe it was because I was too excited last night and kept testing my IQ, so I couldn't fall asleep for a long time. When I finally fell asleep, it was almost dawn.

It was already 10 o'clock when I saw it.

"Oops!"

Zhang Yuan flipped over the bed, washed up quickly for a while, and then hurried out of the house.

"I hope I won't be late, otherwise my sister-in-law will be chanting for a long time..."

The 30-day holiday is very urgent, and there are clear arrangements for each day. I have made an appointment today to go to my aunt's house for lunch.

Donghua City in July is like a stove, with heat waves rolling, and the plants on the roadside are in dire straits.

Zhang Yuan hurried to the subway station, where there is always a comfortable air conditioner.

There is no shortage of energy in this era. The power generation of each large fusion nuclear power plant is comparable to that of the Three Gorges Hydropower Station. The domestic electricity price is as low as 3 cents per kilowatt-hour.

Thanks to this, in addition to the high prices of original petroleum derivatives such as plastics, high-energy-consuming industrial products such as steel and cement have become extremely cheap.

Especially the booming development of nanotechnology has allowed building materials to be updated from generation to generation. For example, if nanosilica is added with 6% of the cement, it can increase the compressive strength by 2 times and improve the workingability of concrete in all aspects.

The popularity of cheap new materials has made the city's surface buildings taller and taller, and there are many high-rise buildings of 1,000 meters apart.

Two hundred years ago, the 828-meter-high Dubai Tower was the tallest building in the world, but now it can only be the tallest building in the village.

And... at the same cost, at least five can be built!

Some transportation rails are even placed at a height of thousands of meters, with skyscrapers as the track pillars.

These are very popular in almost all big cities, and the aerial orbit has become the facade of big cities.

“So many people.”

Donghua City is one of the five first-tier cities in the Xia Kingdom. Even if the morning rush hour has been missed, the subway stations are still crowded.

"Dear passengers, please give courtesy to the elderly and children."

"Please don't smoke or beg in the car."

It is impossible to completely solve the traffic problem.

Trolls can always find the most comfortable angle to criticize the government. If the transportation is too crowded, the government will definitely be criticized; but if the number of subways and there are too many empty seats, it will be considered a "waste of taxpayers' money". Anyway, they will be criticized no matter what, and it will be enough to use it alive.

Zhang Yuan was lined up behind the line and heard someone complaining about "no increase in trains" and so on. He smiled in his heart. He didn't have much thought, but picked up his phone and started to write questions.

This is a very popular "Super Brain" app that can examine a person's memory, arithmetic ability and reasoning ability. Anyway, it's boring to be idle. It's good to try a few questions, and then test your IQ.

IQ is his most concerned issue at the moment.

Whenever I find out that my IQ is very high, the feeling is so good that I can't describe it in words.

The subway station is very noisy and difficult to concentrate, but I don’t know what’s going on. Doing questions will always create a wonderful sense of accomplishment, which makes him feel like eating chocolate beans.

Maybe after using that potion, there was an attribute called "workaholic" on it?

"I finally understand why some people are willing to work all day long. It turns out that they are happy. Using their brains has turned out to be a fun thing!"

Dingdong...

When the subway entered the station, crowds poured in like a tide, and the area where they were originally queued was cleared.

Zhang Yuan walked into the subway, found a place to stand, and wrote one question after another.

As the proficiency of seven-digit four-character operations increases, from one stroke in half a minute to one stroke in 10 seconds, and the calculation speed is still increasing.

The feeling of the answer being about to come out finally slowly appeared.

The more he used his brain, the more he became more and more effective, and this result made him very satisfied.

Soon, he began to fail to satisfy the ordinary four-character operation and became an open square operation.

"Let's have a simple one first, √7812 (keep four significant numbers)"

Zhang Yuan made it difficult for himself.

There are many different methods to manually square an integer. The most common one is called trial quotient, which is somewhat similar to division. As long as the mental arithmetic ability is sufficient, it can be calculated directly.

There are also some algorithms that are a little troublesome, such as continuous fraction expansion, dichotomy, Newtonian iteration, etc.

Fifteen seconds later, he came to a specific conclusion.

“√7812=88.38…”

The answer is correct!

“√444”

“21.07”

The answer is correct!

Ha ha!

Is this what it feels like to be a genius?

It's so...scent!

The carriage was very quiet. Except for the electronic prompt sounds of the subway, everyone was busy immersing in their own world.

Occasionally, there are a few guys who don’t know whether they are reading novels or videos and they can’t help laughing, like fools…

“The fragmented time on the subway should be used to improve yourself, not to entertain yourself!”

A "public intellectual" who returned from studying abroad frowned and was lamenting this bad social atmosphere.

The phenomenon of "head-down people" is often criticized by major media, but it is not very useful if criticized. Everyone should play with it and bow their heads. It is impossible to let the government legislate and prohibit playing with mobile phones in public places, right?

The man's name is Ye Fan. In his perception, everyone in foreign subways reads newspapers instead of playing with mobile phones. The atmosphere is a hundred times better than that of Xia Country (in fact, there is no Internet).

Anyway, no matter what, in his impression, young people abroad live much healthier than young people in Xia Kingdom!

"No wonder this group of people can't get into space. That's because they spend their time studying and entertainment... It's strange to be able to get into space!" Ye Fan thought secretly.

"What's the saying? I just spend all the time others drink coffee on work..."

Especially the young man wearing short-sleeved shirts beside him, a honey smile appeared on his face.

Wow, you should be in love with a 2D girl, right?

No prospect!

(First, let me explain the title of this book. I originally wanted to name "The Age of Deep Space", but it is too serious and the click rate will be very low.)

(Science fiction, everyone understands it. Although "The Wandering Earth" is a hit, it does not mean that other science fiction can also be hit. Most people probably don't want to watch the title of "The Age of Deep Space" directly, and they don't want to click on it.)
Chapter completed!