No problem, we've got 6643 and 4120 to multiply
6643 × 4120 = 4120 × (6643)
+ 4120 × 3 that is equal 12360
+ 4120 × 40 giving us 164800
+ 4120 × 600 that is equal 2472000
+ 4120 × 6000 what gives us 24720000

= 27369160
