I was using the calculator on my iPhone and I entered 169/13 and it told me the answer is 1. I pressed clear a bunch of times in case it was screwed up but it still did not work. So I tried the CalculatorPro app on my iPad and it too told me the answer was 1. I finally Googled 169/13 to get the correct answer of 13. Does this happen on your device? Thanks UPDATE: Nevermind, I'm just stupid and pressed "=" twice because after entering /13 it said 13 so the screen never changed so I thought I didn't press it, so I pressed it again so 13/13 is 1. Whoops!