We're going to solve 7902 multiplied by 1991
7902 × 1991 = 1991 × (7902)
+ 1991 × 2 yielding 3982
+ 1991 × 00 giving us 0
+ 1991 × 900 that results in 1791900
+ 1991 × 7000 which equals 13937000

= 15732882
