just set "first number" to the number you want to divide/multiply/add to/subtract and set "second number" to what you want to divide/multiply/add to/subtract it by and click calculate! (just don't do impossible problems / problems that go to decimals) it ranges from 100-1000 and 0-100 (it can't do advanced math or decimals)
{UPDATE LOG} v.4 released! -can now do subtracting, adding and multiplying- { go check out @seriouslyscratchy1's rendition below!}