Press the first letter of the operation you want to use for basic math! Other more complicated ones just use random letters and inputs left on the keyboard! Then press 1 and 2 to change their values! The cat will show the answer for you.
(IMPORTANT STUFF) In order to do squared or sqrt it only squares the first number ---Keybinds---- E=Enter/Calculate Down=Hide tips [Space] = Show tips A=Add S=Subtract M=Multiply D=Divide Q=Squared P=Power T=Square Root B=Absolute Value