We're going to solve 8139 multiplied by 6720
8139 × 6720 = 6720 × (8139)
+ 6720 × 9 that results in 60480
+ 6720 × 30 what gives us 201600
+ 6720 × 100 that results in 672000
+ 6720 × 8000 giving us 53760000

= 54694080
