No problem, we've got 1990 and 4191 to multiply
1990 × 4191 = 4191 × (1990)
+ 4191 × 0 that is equal 0
+ 4191 × 90 which equals 377190
+ 4191 × 900 resulting in 3771900
+ 4191 × 1000 yielding 4191000

= 8340090
