We're going to solve 9840 multiplied by 8315
9840 × 8315 = 8315 × (9840)
+ 8315 × 0 giving us 0
+ 8315 × 40 what gives us 332600
+ 8315 × 800 yielding 6652000
+ 8315 × 9000 producing 74835000

= 81819600
