We're going to solve 21001748 multiplied by 80354591
21001748 × 80354591 = 80354591 × (21001748)
+ 80354591 × 8 which equals 642836728
+ 80354591 × 40 that results in 3214183640
+ 80354591 × 700 that equals 56248213700
+ 80354591 × 1000 that results in 80354591000
+ 80354591 × 00000 that results in 0
+ 80354591 × 000000 that results in 0
+ 80354591 × 1000000 producing 80354591000000
+ 80354591 × 20000000 yielding 1607091820000000

= 1687586870825068
