We're going to solve 3991 multiplied by 4971
3991 × 4971 = 4971 × (3991)
+ 4971 × 1 that equals 4971
+ 4971 × 90 that is equal 447390
+ 4971 × 900 yielding 4473900
+ 4971 × 3000 that equals 14913000

= 19839261
