What is 22 squared

if you want to do it in your head it is 400+80+4=484

I did this as a perfect square of (20+2)

$$\\(20+2)^2=20^2+2*2*20+2^2 = 400+80+4 = 484\\\\ \mbox{This is because}\\\\ (a+b)^2=a^2+2ab+b^2$$

$${{\mathtt{22}}}^{{\mathtt{2}}}$$  = 22*22 = 484.