Alright, let's work through 3906 times 7407 step by step
3906 × 7407 = 7407 × (3906)
+ 7407 × 6 giving us 44442
+ 7407 × 00 producing 0
+ 7407 × 900 resulting in 6666300
+ 7407 × 3000 that equals 22221000

= 28931742
