No problem, we've got 3645 and 5683 to multiply
3645 × 5683 = 5683 × (3645)
+ 5683 × 5 that equals 28415
+ 5683 × 40 which equals 227320
+ 5683 × 600 giving us 3409800
+ 5683 × 3000 producing 17049000

= 20714535
