注目の話題: マッチングアプリで知り合っていきなりお泊まりを誘われました; 女前の画像見つけた　女性の方意見求む; 昭和時代の方々に質問！

Science,English,and math 4th

No.203　21/03/30 11:24
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

【Estimation on Fermi and something approximate】

《Estimating a scale of market on jeans》

By the way the scale of market on jeans in Japan was about a hundred billion, and six trillion in the world in 2020

As to the scale of the domestic market is less half than the one which the author and his friend calculated, but the scale of market in the world is six trillion.

The author said he read an article on a magazine and the article said that a tendency of being away from putting on jeans among the youth has gone ahead. Some of jeans shop of which sales have dropped to half twenty years ago.

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