Alright, let's work through 9664 times 8450 step by step
9664 × 8450 = 8450 × (9664)
+ 8450 × 4 that is equal 33800
+ 8450 × 60 that results in 507000
+ 8450 × 600 that is equal 5070000
+ 8450 × 9000 producing 76050000

= 81660800
