Alright, let's work through 9669 times 8639 step by step
9669 × 8639 = 8639 × (9669)
+ 8639 × 9 resulting in 77751
+ 8639 × 60 that results in 518340
+ 8639 × 600 giving us 5183400
+ 8639 × 9000 producing 77751000

= 83530491
