Wrong calculation from eval function

Question

Why this calculation equal 55. it's should be equal 100
https://code.sololearn.com/WRh3fh8viTWq/?ref=app

Answer 1

Because of BODMAS rule. Multiplication has more priority than addition. So 5+(5*10)
5+50
55

Answer 2

Oh okay I'll try it

Answer 3

How to get 100 in results

Answer 4

I can not use 10 * 10 because i'm in calculator project so the input is depends on user

Answer 5

Use parenthesis to increase priority. Like (5+5)*10