We're going to solve 2640 multiplied by 4001
2640 × 4001 = 4001 × (2640)
+ 4001 × 0 giving us 0
+ 4001 × 40 giving us 160040
+ 4001 × 600 producing 2400600
+ 4001 × 2000 resulting in 8002000

= 10562640
