Alright, let's work through 3940 times 7628 step by step
3940 × 7628 = 7628 × (3940)
+ 7628 × 0 which equals 0
+ 7628 × 40 which equals 305120
+ 7628 × 900 producing 6865200
+ 7628 × 3000 which equals 22884000

= 30054320
