Alright, let's work through 8320 times 6249 step by step
8320 × 6249 = 6249 × (8320)
+ 6249 × 0 yielding 0
+ 6249 × 20 producing 124980
+ 6249 × 300 what gives us 1874700
+ 6249 × 8000 producing 49992000

= 51991680
