Alright, let's work through 3091 times 4148 step by step
3091 × 4148 = 4148 × (3091)
+ 4148 × 1 that results in 4148
+ 4148 × 90 what gives us 373320
+ 4148 × 000 that results in 0
+ 4148 × 3000 producing 12444000

= 12821468
