Thank you: you're confusing simple calculation with math. The calculator can certainly figure out 56 x 73 faster than you (assuming you don't push any buttons wrong), but that's the smallest part of math, and practicing even those mundane skills helps you learn and grow the connections in your brain.
Galileo compared the universe to a book, “which stands continually open to our gaze, but it cannot be understood unless one first learns to comprehend the language and interpret the characters in which it is written. It is written in the language of mathematics . . .”
Try not to be randomly insulting: go out in the world and read, instead.