Alright, let's work through 3934 times 1002 step by step
3934 × 1002 = 1002 × (3934)
+ 1002 × 4 yielding 4008
+ 1002 × 30 that equals 30060
+ 1002 × 900 yielding 901800
+ 1002 × 3000 which equals 3006000

= 3941868
