Answer the prompts a necessary. It is just a basic calculator. Other features of the calculator: m & c together will clear first entry of memory m & a will add the central number to the memory a & [space] will clear the whole memory C with [space] will restart the questions. It takes some time before the memory registers, so be patient. I am trying to make a username sensitive memory. Credit to @-Flames- for the Memory, if I can figure it out.