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Re:Why A4? – The Mathematical Beauty of Paper Size by williamdclt on Monday September 05, 2022 @06:53AM (#32722881)
> Several countries (e.g. France) use the word pound (livre) to mean 500g

Note that nobody I know below the age of 70 uses the "livre" unit in France. It's something you see pretty much only in old recipes

Re:Why A4? – The Mathematical Beauty of Paper Size by WastingMyTime89 on Monday September 05, 2022 @11:55AM (#32725728)
Cereal production is still expressed in “quintal/hectare” with quintal keeping its old meaning of 100 livres but using the metric ones so 100kg.