No problem, we've got 6462 and 9891 to multiply
6462 × 9891 = 9891 × (6462)
+ 9891 × 2 that equals 19782
+ 9891 × 60 that is equal 593460
+ 9891 × 400 resulting in 3956400
+ 9891 × 6000 which equals 59346000

= 63915642
