Alright, let's work through 9993 times 2551 step by step
9993 × 2551 = 2551 × (9993)
+ 2551 × 3 resulting in 7653
+ 2551 × 90 that is equal 229590
+ 2551 × 900 which equals 2295900
+ 2551 × 9000 resulting in 22959000

= 25492143
