No problem, we've got 5991 and 3111 to multiply
5991 × 3111 = 3111 × (5991)
+ 3111 × 1 yielding 3111
+ 3111 × 90 producing 279990
+ 3111 × 900 that is equal 2799900
+ 3111 × 5000 resulting in 15555000

= 18638001
