Alright, let's work through 2604 times 6715 step by step
2604 × 6715 = 6715 × (2604)
+ 6715 × 4 producing 26860
+ 6715 × 00 producing 0
+ 6715 × 600 which equals 4029000
+ 6715 × 2000 yielding 13430000

= 17485860
