Here you go then:
injashkin your calculator:
I think its better if you change the color of the equal sine.
When you make an account, the calculator shows the final value twice.
About the division by 0 I say you the same thing that I said to stel: When you divide by 0 you can’t say is infinite, because currently its not defined if is infinite or other thing, so my advice is when you divide something by 0 put “Its not possible to divide by 0”.