So, I create math function solve those problem.
Here you can try this codepen: https://codepen.io/gauravnumber/pen/RwLaePQ
Source code of repo here:
Currently math-code support addition, subtraction, multiplication, divison, <, >, <=, >=, =, !=
Floating digit also.
You can multiply 30, 50 digit using decimal number with high accuracy.