No problem, we've got 3645 and 4689 to multiply
3645 × 4689 = 4689 × (3645)
+ 4689 × 5 that results in 23445
+ 4689 × 40 giving us 187560
+ 4689 × 600 producing 2813400
+ 4689 × 3000 producing 14067000

= 17091405
