Alright, let's work through 8297 times 8639 step by step
8297 × 8639 = 8639 × (8297)
+ 8639 × 7 yielding 60473
+ 8639 × 90 that equals 777510
+ 8639 × 200 yielding 1727800
+ 8639 × 8000 yielding 69112000

= 71677783
