(1) Google search is a calculator
Go to your standard google toolbar and type in: 2+2
It’s also a pretty smart calculator, able to handle variables, conversions, and understanding words.
Try:
(2+i)*(3+2i)
Days in two fortnights
Bushels in a pack
Half a cup in teaspoons
G
40 in hex
25.50USD in euros
96F in celsius