Alright, let's work through 9139 times 5991 step by step
9139 × 5991 = 5991 × (9139)
+ 5991 × 9 resulting in 53919
+ 5991 × 30 that is equal 179730
+ 5991 × 100 producing 599100
+ 5991 × 9000 that is equal 53919000

= 54751749
