Alright, let's work through 6415 times 1205 step by step
6415 × 1205 = 1205 × (6415)
+ 1205 × 5 which equals 6025
+ 1205 × 10 that is equal 12050
+ 1205 × 400 producing 482000
+ 1205 × 6000 that is equal 7230000

= 7730075
