No problem, we've got 6443 and 8635 to multiply
6443 × 8635 = 8635 × (6443)
+ 8635 × 3 giving us 25905
+ 8635 × 40 that is equal 345400
+ 8635 × 400 producing 3454000
+ 8635 × 6000 that results in 51810000

= 55635305
