We're going to solve 8643 multiplied by 1407
8643 × 1407 = 1407 × (8643)
+ 1407 × 3 which equals 4221
+ 1407 × 40 producing 56280
+ 1407 × 600 which equals 844200
+ 1407 × 8000 producing 11256000

= 12160701
