Alright, let's work through 9645 times 8108 step by step
9645 × 8108 = 8108 × (9645)
+ 8108 × 5 that is equal 40540
+ 8108 × 40 producing 324320
+ 8108 × 600 what gives us 4864800
+ 8108 × 9000 what gives us 72972000

= 78201660
