Alright, let's work through 8688 times 8355 step by step
8688 × 8355 = 8355 × (8688)
+ 8355 × 8 producing 66840
+ 8355 × 80 that is equal 668400
+ 8355 × 600 giving us 5013000
+ 8355 × 8000 which equals 66840000

= 72588240
