We're going to solve 6421 multiplied by 1540
6421 × 1540 = 1540 × (6421)
+ 1540 × 1 producing 1540
+ 1540 × 20 giving us 30800
+ 1540 × 400 resulting in 616000
+ 1540 × 6000 what gives us 9240000

= 9888340
