Alright, let's work through 8499 times 9139 step by step
8499 × 9139 = 9139 × (8499)
+ 9139 × 9 that results in 82251
+ 9139 × 90 giving us 822510
+ 9139 × 400 that equals 3655600
+ 9139 × 8000 yielding 73112000

= 77672361
