Can anyone recommend a reliable online calculator to download?

divide / division

multiply * multiplication

minus - subtraction

+ plus or addition

equals = just give

Or lie to me and ask what exactly am I asking when I want to meet someone I respect?

Don't apps take up space, Zip files maybe take less space then having the app or file just as is. Where sometimes creating an extra area to store information such as calculating the amount of space taken using the calculator. Uh sir or mam what are trying to do if so seriously need an applied solution to the downloading?

Wolfram Alpha is an online calculator that doesn't require a download. It can solve almost any problem you give it.

Minecraft

Easier solution,google has a BUILT IN CALCULATOR. Its awesome.