Alright, let's work through 3421 times 7715 step by step
3421 × 7715 = 7715 × (3421)
+ 7715 × 1 that results in 7715
+ 7715 × 20 that equals 154300
+ 7715 × 400 producing 3086000
+ 7715 × 3000 that results in 23145000

= 26393015
