Alright, let's work through 3991 times 5614 step by step
3991 × 5614 = 5614 × (3991)
+ 5614 × 1 what gives us 5614
+ 5614 × 90 yielding 505260
+ 5614 × 900 yielding 5052600
+ 5614 × 3000 what gives us 16842000

= 22405474
