Alright, let's work through 9991 times 2912 step by step
9991 × 2912 = 2912 × (9991)
+ 2912 × 1 giving us 2912
+ 2912 × 90 that equals 262080
+ 2912 × 900 that is equal 2620800
+ 2912 × 9000 producing 26208000

= 29093792
