Alright, let's work through 8928 times 9705 step by step
8928 × 9705 = 9705 × (8928)
+ 9705 × 8 yielding 77640
+ 9705 × 20 giving us 194100
+ 9705 × 900 what gives us 8734500
+ 9705 × 8000 producing 77640000

= 86646240
