Welcome to calculator. Please calculate number.

> 1+1

One plus one equals two.
1 + 1 = 2.

2

> sqrt(4)

Also two.

2

> sqrt(4) * sqrt(4)

2 * 2 = 4 Four :D

You might be good at calculating number!

> 4 / sqrt(2)

Ummmmmmm …. ….