Alright, let's work through 3993 times 4797 step by step
3993 × 4797 = 4797 × (3993)
+ 4797 × 3 that is equal 14391
+ 4797 × 90 resulting in 431730
+ 4797 × 900 yielding 4317300
+ 4797 × 3000 yielding 14391000

= 19154421
