HACKER Q&A
📣 gushogg-blake

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


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?

  👤 PaulHoule Accepted Answer ✓
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.

👤 colinb
Does your calculator have a reciprocal button? That’d get you to the desired result with only one extra keystroke.