if you don't know what to do, here's an explanation. First if you want to know what operations the calculator knows, then when it says "Show List?" say Yes or yes, otherwise say no (capitol or not capitol n). Then when it says "A=?", that means enter your first NUMBER-NOT ANYTHING ELSE- then when it says "Operator=?", enter an operation from the list. Then it will say "B=?", do the same thing as when it said "A=?". P.S. For those of you who don't know what these symbols mean-although I'm assuming you do- these mean, /=division *=multiplication ^=exponent (2^2=4, etc.)