No problem, we've got 4491 and 6355 to multiply
4491 × 6355 = 6355 × (4491)
+ 6355 × 1 producing 6355
+ 6355 × 90 which equals 571950
+ 6355 × 400 which equals 2542000
+ 6355 × 4000 producing 25420000

= 28540305
