We're going to solve 1680 multiplied by 8991
1680 × 8991 = 8991 × (1680)
+ 8991 × 0 what gives us 0
+ 8991 × 80 producing 719280
+ 8991 × 600 yielding 5394600
+ 8991 × 1000 resulting in 8991000

= 15104880
