Alright, let's work through 9135 times 8599 step by step
9135 × 8599 = 8599 × (9135)
+ 8599 × 5 yielding 42995
+ 8599 × 30 resulting in 257970
+ 8599 × 100 which equals 859900
+ 8599 × 9000 yielding 77391000

= 78551865
