11×11=4 22×22=16 33×33=? Answer if you are are genius with details?

Surprise, surprise! Multiplication remains multiplication. But the numbers are not what they seem.

Take the digit sums and multiply them:

11×11 -> (1 + 1)(1 + 1) = 2 x 2 = 4
22 x 22 -> (2 + 2)(2 + 2) = 4 x 4 = 16

Thus:

33 x 33 -> (3 + 3)(3 + 3) = 6 x 6 = 36.