Alright, let's work through 8999 times 8578 step by step
8999 × 8578 = 8578 × (8999)
+ 8578 × 9 producing 77202
+ 8578 × 90 giving us 772020
+ 8578 × 900 giving us 7720200
+ 8578 × 8000 resulting in 68624000

= 77193422
