Web Calculator

Question

I just created a calculator app but I discovered it displays differently on other devices so can you give me suggestion to make it responsive to other devices also?
Here is the code:
https://code.sololearn.com/W53hRXwxBm8r/#html

Answer 1

boostrap can help you with that c:

Answer 2

https://code.sololearn.com/W5N84rm25aSW/?ref=app

Answer 3

Awesome

Answer 4

nice

Answer 5

@Aldo Ok!
Thank you also