No problem, we've got 6327 and 660 to multiply
6327 × 660 = 660 × (6327)
+ 660 × 7 resulting in 4620
+ 660 × 20 that results in 13200
+ 660 × 300 what gives us 198000
+ 660 × 6000 resulting in 3960000

= 4175820
