Short description of Calculator Prompter 2.6: Calculator Prompter is a math expression calculator. Calcualtor Prompter has a built-in error recognition system that helps you get correct results. With Calculator Prompter you can enter the whole expression, including brackets, and operators. You can use Calculator to perform any of the standard operations for which you would normally use a handheld calculator. Calculator performs arithmetic, such as root (#) and power (^).