Computer calculators mimic the functions of hand-held ones, including the memory function. This allows you to store a single figure for use in future calculations.

You can enter the values using your keyboard as well as the on-screen keyboard. Read: How to use the Graphing Calculator in Windows 11/10 How do you use a Calculator to convert?

Whatever the reason you have to navigate your computer without a mouse, using only your keyboard, mouse keys can help.