Alright, let's work through 8724 times 9585 step by step
8724 × 9585 = 9585 × (8724)
+ 9585 × 4 producing 38340
+ 9585 × 20 giving us 191700
+ 9585 × 700 which equals 6709500
+ 9585 × 8000 producing 76680000

= 83619540
