It all depends on what calculator you use to know how to program the formula into it.
If you have a computer, you already have the calculator that is part of the computer's program.
Scroll down to related links and look at "Color Code Calculator - Resistor values with 4 and 5 color bands".
it is part of a computer program
example output of c++ calculator
The calculator will run a certain number of random numbers to test a program.
"Road Calculation & setting out" Basic program for Casio Calculator fx-880p.
programaticly
calculator
You can buy a calculator at any office store, I would suspect. In windows, the calculator program is usually under Start - Programs - Accessories.
An advanced semiprogrammable calculator program tool.
1800, you should have used the calculator program on your computer.