Alright, let's work through 3981 times 4851 step by step
3981 × 4851 = 4851 × (3981)
+ 4851 × 1 that results in 4851
+ 4851 × 80 yielding 388080
+ 4851 × 900 yielding 4365900
+ 4851 × 3000 yielding 14553000

= 19311831
