Alright, let's work through 3476 times 3991 step by step
3476 × 3991 = 3991 × (3476)
+ 3991 × 6 yielding 23946
+ 3991 × 70 that results in 279370
+ 3991 × 400 yielding 1596400
+ 3991 × 3000 resulting in 11973000

= 13872716
