We're going to solve 7857 multiplied by 1055
7857 × 1055 = 1055 × (7857)
+ 1055 × 7 resulting in 7385
+ 1055 × 50 which equals 52750
+ 1055 × 800 resulting in 844000
+ 1055 × 7000 giving us 7385000

= 8289135
