No problem, we've got 6688 and 8639 to multiply
6688 × 8639 = 8639 × (6688)
+ 8639 × 8 that equals 69112
+ 8639 × 80 yielding 691120
+ 8639 × 600 which equals 5183400
+ 8639 × 6000 that equals 51834000

= 57777632
