No problem, we've got 6324 and 627 to multiply
6324 × 627 = 627 × (6324)
+ 627 × 4 what gives us 2508
+ 627 × 20 resulting in 12540
+ 627 × 300 that results in 188100
+ 627 × 6000 yielding 3762000

= 3965148
