Calculator issue?

Question

css

I have a formula calculator.

Question:

Is it possible to make it so that the user can enter fractional numbers into it not only with a dot (12.1), but also with a comma (12.1)?

Thanks

Answer 1

I have an overloaded example, but with comments. This is what you need, I think.

Answer 2

See how the calculator works.
The most stupid way: either during the input, or after the input - replace the jammed ones with dots, then calculate.