We're going to solve 1999 multiplied by 4212
1999 × 4212 = 4212 × (1999)
+ 4212 × 9 what gives us 37908
+ 4212 × 90 producing 379080
+ 4212 × 900 producing 3790800
+ 4212 × 1000 yielding 4212000

= 8419788
