注目の話題: 子ありと子なしはどちらが老後安泰？; 昭和時代の方々に質問！; 子どもができたら

Science,English,and math 4th

No.202　21/03/30 11:10
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

【Estimation on Fermi and something approximate】

《Estimating a scale of market on jeans》

The author, If one of ten people buy two pair of jeans a year, as the whole population in the world is about sixty billion, so multiply sixty billion by zero.point five by five thousand is equal to six trillion. So the scale of market on jeans in the whole world is six trillion.

The conversation was done in 2000. The author said he found interesting that the estimated value on the scale of market both in Japan and the whole world on jeans was led from a conversation nonchalantly, so he remembers it.

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