We're going to solve 1581 multiplied by 4173
1581 × 4173 = 4173 × (1581)
+ 4173 × 1 giving us 4173
+ 4173 × 80 yielding 333840
+ 4173 × 500 giving us 2086500
+ 4173 × 1000 yielding 4173000

= 6597513
