No problem, we've got 3648 and 5645 to multiply
3648 × 5645 = 5645 × (3648)
+ 5645 × 8 what gives us 45160
+ 5645 × 40 that equals 225800
+ 5645 × 600 resulting in 3387000
+ 5645 × 3000 producing 16935000

= 20592960
