Alright, let's work through 8662 times 8412 step by step
8662 × 8412 = 8412 × (8662)
+ 8412 × 2 that equals 16824
+ 8412 × 60 producing 504720
+ 8412 × 600 giving us 5047200
+ 8412 × 8000 giving us 67296000

= 72864744
