We're going to solve 2581 multiplied by 6351
2581 × 6351 = 6351 × (2581)
+ 6351 × 1 that equals 6351
+ 6351 × 80 yielding 508080
+ 6351 × 500 resulting in 3175500
+ 6351 × 2000 resulting in 12702000

= 16391931
