Alright, let's work through 4139 times 3506 step by step
4139 × 3506 = 3506 × (4139)
+ 3506 × 9 which equals 31554
+ 3506 × 30 that results in 105180
+ 3506 × 100 which equals 350600
+ 3506 × 4000 producing 14024000

= 14511334
