We're going to solve 1991 multiplied by 7873
1991 × 7873 = 7873 × (1991)
+ 7873 × 1 producing 7873
+ 7873 × 90 what gives us 708570
+ 7873 × 900 that results in 7085700
+ 7873 × 1000 that equals 7873000

= 15675143
