Alright, let's work through 2551 times 6433 step by step
2551 × 6433 = 6433 × (2551)
+ 6433 × 1 that results in 6433
+ 6433 × 50 giving us 321650
+ 6433 × 500 that results in 3216500
+ 6433 × 2000 that is equal 12866000

= 16410583
