Alright, let's work through 8599 times 7931 step by step
8599 × 7931 = 7931 × (8599)
+ 7931 × 9 that results in 71379
+ 7931 × 90 resulting in 713790
+ 7931 × 500 resulting in 3965500
+ 7931 × 8000 that is equal 63448000

= 68198669
