My calculator does not round correctly. How to fix?

Question

Hi guys! I used the eval() to make a calculator and I found an errors in the calculations. For example: if you subtract 0.7 from 8.7 the answer is 7.999999999999999. How can I fix this bug?"

Code is here: https://code.sololearn.com/WkBlbmppsdou

Answer 1

Delicate Cat, I haven't learned Python yet:)