Alright, let's work through 6715 times 604 step by step
6715 × 604 = 604 × (6715)
+ 604 × 5 resulting in 3020
+ 604 × 10 which equals 6040
+ 604 × 700 that results in 422800
+ 604 × 6000 that is equal 3624000

= 4055860
