Alright, let's work through 8768 times 9831 step by step
8768 × 9831 = 9831 × (8768)
+ 9831 × 8 that is equal 78648
+ 9831 × 60 what gives us 589860
+ 9831 × 700 yielding 6881700
+ 9831 × 8000 which equals 78648000

= 86198208
