Question

How do you find the array of 14x21

Answer 1

You can use the array to easily find the product between 14 and 21. The array has 21 columns by 14 rows. Separating 20 columns and 10 rows, we can compute 21 x 14 as

20 x 10 + 10 x 1 + 20 x 4 + 4 x 1 =

= 200 + 10 + 80 + 4 = 294