Caution when downloading. There is one huge script in the Stage and may crash Scratch. The Hard to make calculator is now on scratch. Here are the controls: Arrow Keys: Move Cursor Space or X: Select R: Reset all Up to 7 numbers a line, OK? Pretty basic, right? WRONG! This project has a million "if" blocks to get this running smoothly. Do not use in your project unless you give credit. Might need to download.