This takes me way back to the Win 3.1 days, where I used the calculator, Notepad and looping the macro recorder to do number of calculations and optimizations.

This takes me way back to the Win 3.1 days, where I used the calculator, Notepad and looping the macro recorder to do number of calculations and optimizations. There were a number of special characters Calculator accepted to make this feasible. After all this time, the only one I can remember is p for pi.