square and square root help!

I don't know if this helps but I found out another way to calculate the square of any two digit number. Ex 1: find 16^2 =10^2 + 6^2 + (60*2) =100 + 36 + 120 = 256 Ex 2: find 19^2 = 10^2 + 9^2 + (90*2) = 100 + 81 + 180 = 361 I was trying to find out a way to take squares of smaller digits inside of t...