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by Arnavion 908 days ago
>I'm not sure how either term is used in the case of multiplication

(I grew up in India.) I imagine it was just "multiply 2 into 10" that got shortened into "2 into 10", and then "2 into 10" by itself became a noun that represents the product, so "What is 2 into 10? 2 into 10 is 20."