We're going to solve 7887 multiplied by 1729
7887 × 1729 = 1729 × (7887)
+ 1729 × 7 which equals 12103
+ 1729 × 80 which equals 138320
+ 1729 × 800 giving us 1383200
+ 1729 × 7000 resulting in 12103000

= 13636623
