Why 12x12 equals 144?

12 x 12 is the same thing as adding 12 twelve times.

12 x 12 = 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12

= 24 + 24 + 24 + 24 + 24 + 24

= 48 + 48 + 48

= 48

+48

+48

-------

= 144