No problem, we've got 5665 and 3601 to multiply
5665 × 3601 = 3601 × (5665)
+ 3601 × 5 yielding 18005
+ 3601 × 60 which equals 216060
+ 3601 × 600 which equals 2160600
+ 3601 × 5000 that is equal 18005000

= 20399665
