Wang Wangzhi starts from Sharingan

Chapter 21 Body Mass Index·BMI
Body mass index is the BMI (Body Mass Index [4]) index, referred to as body mass index. It is a standard commonly used in the world to measure the body's fatness and thinness and whether it is healthy.

The calculation formula is: BMI=weight ÷ (height)^2. (Unit of weight: kilogram; unit of height: meter.)
A normal BMI is between 20 and 25, with over 25 being overweight and over 30 being obese.

ps: Well, some people think Kitagawa Sora's weight was a bit heavier when he was a freshman in junior high school, so I'll change it a little bit.

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