Alright, let's work through 5415 times 7868 step by step
5415 × 7868 = 7868 × (5415)
+ 7868 × 5 producing 39340
+ 7868 × 10 giving us 78680
+ 7868 × 400 resulting in 3147200
+ 7868 × 5000 which equals 39340000

= 42605220
