We're going to solve 3681 multiplied by 5080
3681 × 5080 = 5080 × (3681)
+ 5080 × 1 resulting in 5080
+ 5080 × 80 giving us 406400
+ 5080 × 600 producing 3048000
+ 5080 × 3000 resulting in 15240000

= 18699480
