Help buying a calculator program

Question

Is there an economical calculator program I can buy that will let me multiply and divide numbers in the hundreds of digits and show all of the digits?

Answer 1

What have you looked for so far? This is likely something you can get for free. A quick search on Google turns up https://defuse.ca/big-number-calculator.htm

This is also possible with many programming languages, if that is something you or a colleague is interested in.

Answer 2

The Python programming language is free. It brings a GUI that you can type arithmetic into and automatically extends from normal integers to arbitrary length integers when needed.