No problem, we've got 6442 and 9921 to multiply
6442 × 9921 = 9921 × (6442)
+ 9921 × 2 producing 19842
+ 9921 × 40 resulting in 396840
+ 9921 × 400 that is equal 3968400
+ 9921 × 6000 resulting in 59526000

= 63911082
