No problem, we've got 6129 and 1641 to multiply
6129 × 1641 = 1641 × (6129)
+ 1641 × 9 what gives us 14769
+ 1641 × 20 giving us 32820
+ 1641 × 100 that is equal 164100
+ 1641 × 6000 giving us 9846000

= 10057689
