Alright, let's work through 2991 times 4108 step by step
2991 × 4108 = 4108 × (2991)
+ 4108 × 1 that results in 4108
+ 4108 × 90 that results in 369720
+ 4108 × 900 producing 3697200
+ 4108 × 2000 that results in 8216000

= 12287028
