Improve calculator.
Why we can type in calculator using our keyboard. When tapping a calculator's typing bar our keyboard will pop-up and allow you to type anything in it. And also add a back button when pressing functions in calculator.
I’m not sure what exactly you mean but back button works as expected in functions and typing by keyboard is available on purpose and will not be removed.
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Unknown commented
This is a calculator so why we can able to type in calculator using our keyboard? I can type letters in calculator because when I tap the typing bar (a bar where we can type number & symbol, there it will shown) the keyboard will pop-up. That's so annoying