Alright, let's work through 8680 times 9838 step by step
8680 × 9838 = 9838 × (8680)
+ 9838 × 0 what gives us 0
+ 9838 × 80 what gives us 787040
+ 9838 × 600 yielding 5902800
+ 9838 × 8000 that results in 78704000

= 85393840
