We're going to solve 2991 multiplied by 6309
2991 × 6309 = 6309 × (2991)
+ 6309 × 1 resulting in 6309
+ 6309 × 90 what gives us 567810
+ 6309 × 900 that results in 5678100
+ 6309 × 2000 yielding 12618000

= 18870219
