Alright, let's work through 3099 times 4291 step by step
3099 × 4291 = 4291 × (3099)
+ 4291 × 9 producing 38619
+ 4291 × 90 resulting in 386190
+ 4291 × 000 that is equal 0
+ 4291 × 3000 resulting in 12873000

= 13297809
