We're going to solve 8505 multiplied by 9840
8505 × 9840 = 9840 × (8505)
+ 9840 × 5 that equals 49200
+ 9840 × 00 yielding 0
+ 9840 × 500 producing 4920000
+ 9840 × 8000 that equals 78720000

= 83689200
