Alright, let's work through 8688 times 1215 step by step
8688 × 1215 = 1215 × (8688)
+ 1215 × 8 giving us 9720
+ 1215 × 80 producing 97200
+ 1215 × 600 that equals 729000
+ 1215 × 8000 that is equal 9720000

= 10555920
