Alright, let's work through 3828 times 7890 step by step
3828 × 7890 = 7890 × (3828)
+ 7890 × 8 which equals 63120
+ 7890 × 20 giving us 157800
+ 7890 × 800 producing 6312000
+ 7890 × 3000 which equals 23670000

= 30202920
