This is a calculator app I created as a simple project :)
How to Use:
> Tap upper left corner on the screen (Above the 7 button) to Clear All / Reset.
> Tap upper right corner on the screen (Above the 9 button) to Delete one digit at a time.
> Press Upper right button to Clear last entry if an Operator is used, press again to Clear All / Reset.
> Press Lower right button to display final result "equal to ="