• @Maalus@lemmy.world
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      -112 hours ago

      I mean, equally as easy to split the equation. Born in 1999? Subtract current year from 1990. Then subtract 9. Easy.

        • @Maalus@lemmy.world
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          111 hours ago

          If you don’t see a difference between “do the tens, then do a simple subtraction with digits between 1 - 9” and dividing an arbitrary number by four, then there is no sense arguing. Also it would lead to bad results in your example - the average number of legs a sheep has isn’t 4.