Alright, let's work through 8300 times 4814 step by step
8300 × 4814 = 4814 × (8300)
+ 4814 × 0 what gives us 0
+ 4814 × 00 giving us 0
+ 4814 × 300 what gives us 1444200
+ 4814 × 8000 yielding 38512000

= 39956200
