Alright, let's work through 6415 times 4211 step by step
6415 × 4211 = 4211 × (6415)
+ 4211 × 5 which equals 21055
+ 4211 × 10 that equals 42110
+ 4211 × 400 resulting in 1684400
+ 4211 × 6000 producing 25266000

= 27013565
