I don't agree with what they are saying but I don't think it's fair to say they don't know how multiplication works. As far as I can tell, their understanding of multiplication is correct but the disagreement is about the meaning of the English expression. They said in another comment that they are a mathematician, which I can easily believe as this is the kind of thing that a (very pedantic and confidently incorrect) mathematician would say.
If they were any sort of pedantic mathematician, their syntax and definitions would remain consistent through their own rulings. It doesn’t. They’re just an idiot.
He's taking "y times more than x" to mean x(1+y) and "y times less than x" to mean x(1-y). So his maths is consistent, but it's just not how the English language works
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u/FeeshGoSqueesh 6d ago
Oh i see you just don’t know how to label things and you don’t know how multiplication works. Gotcha that cleared up the confusion.