Question

What is the produce of 13 and 12?

Answer 1

Explanation:

One way you could approach this problem would be to multiply 12 by 12, obtaining 144, and then adding 12 to that, obtaining 156. Note that 13 = 12·1, and that 13·12 = (12 + 1)·12 = 144 + 12 = 156.