Alright, let's work through 3929 times 7838 step by step
3929 × 7838 = 7838 × (3929)
+ 7838 × 9 producing 70542
+ 7838 × 20 that is equal 156760
+ 7838 × 900 yielding 7054200
+ 7838 × 3000 that results in 23514000

= 30795502
