We're going to solve 1981 multiplied by 5579
1981 × 5579 = 5579 × (1981)
+ 5579 × 1 that equals 5579
+ 5579 × 80 that equals 446320
+ 5579 × 900 giving us 5021100
+ 5579 × 1000 resulting in 5579000

= 11051999
