No problem, we've got 6224 and 657 to multiply
6224 × 657 = 657 × (6224)
+ 657 × 4 resulting in 2628
+ 657 × 20 that equals 13140
+ 657 × 200 resulting in 131400
+ 657 × 6000 that is equal 3942000

= 4089168
