We're going to solve 3135 multiplied by 4003
3135 × 4003 = 4003 × (3135)
+ 4003 × 5 yielding 20015
+ 4003 × 30 resulting in 120090
+ 4003 × 100 giving us 400300
+ 4003 × 3000 yielding 12009000

= 12549405
