We're going to solve 1981 multiplied by 2111
1981 × 2111 = 2111 × (1981)
+ 2111 × 1 what gives us 2111
+ 2111 × 80 resulting in 168880
+ 2111 × 900 giving us 1899900
+ 2111 × 1000 which equals 2111000

= 4181891
