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Ask HN: Why don't calculators have an "into" button? Or do they?

by gushogg-blake on 8/6/24, 2:30 PM with 3 comments

Multiplication is the same both ways so it doesn't matter, but for division I'm always wanting a button that says (last result) "into" x. Basically division with the two sides swapped.

Instead you have to type x, divide button, then type out the last result. Am I missing something?

by PaulHoule on 8/6/24, 2:50 PM
I used to use one of these
https://en.wikipedia.org/wiki/HP_48_series
where you kept values on the stack and could reverse the values with the SWAP key. I currently have a
https://en.wikipedia.org/wiki/HP_Prime
which I use in Algebraic mode instead of RPN.
by colinb on 8/6/24, 2:36 PM
Does your calculator have a reciprocal button? That’d get you to the desired result with only one extra keystroke.