No problem, we've got 1999 and 5995 to multiply
1999 × 5995 = 5995 × (1999)
+ 5995 × 9 resulting in 53955
+ 5995 × 90 which equals 539550
+ 5995 × 900 what gives us 5395500
+ 5995 × 1000 yielding 5995000

= 11984005
