Alright, let's work through 6457 times 1319 step by step
6457 × 1319 = 1319 × (6457)
+ 1319 × 7 producing 9233
+ 1319 × 50 that is equal 65950
+ 1319 × 400 producing 527600
+ 1319 × 6000 producing 7914000

= 8516783
