Niven
28th Oct 2012
18th Nov 2012
https://powdertoy.co.uk/Discussions/Threa d/View.html?Thread=15283 goto that link for instructions on OP and OPS (There may be some spaces when you copy/paste it so just backspace those)
electronics
computer
advanced
electronic
logic
multiplication
calculator
Comments

on first launch if you press 1 it shows 9. There also some bugs with long calculations, however, it's really amazing thing.

i dont really like calculators... but i probably would if i could make something as cool as this! i like all the little bits and pieces. brilliant!!!

13+1750+13+8=overflow? should equal one...

Simply amazing. Good job. Could never do this.

@ldfleur multiplication and squaring are 1 digit operations ("double digits (add/sub only)"). Also the neg value was prob cause your last operation was subtraction so the calc did zero  whatever you inputted. Fixed now @08ohib I got 2

1+1=OF!?!?!?!?!?!?!?!?!?!?!?

Im not saying its simple but its the sort of thing that lots of people would have the brain to do.Have my vote +1

5*12=63

And 10^2 should give you OF, not 0

Whenever you type in a positive value and spark equals, it returns the negative version of the value..