If you see an operator, pop off enough stuff from the stack, do the operation, and put the result back on the stack. In Python, this is very simple (see the entire code on this gist): ...

An operator is, in general, a typographical symbol that means something special to the Python interpreter, and tells it to do something with the literals or variables next to it. Many are basic ...

You're taking a new programming class this fall, and you don't know anything about code. Python is taught widely in schools, and it's one of the most loved programming languages because it's simple.