Alright, let's work through 3949 times 4072 step by step
3949 × 4072 = 4072 × (3949)
+ 4072 × 9 yielding 36648
+ 4072 × 40 what gives us 162880
+ 4072 × 900 what gives us 3664800
+ 4072 × 3000 producing 12216000

= 16080328
