No problem, we've got 4639 and 6663 to multiply
4639 × 6663 = 6663 × (4639)
+ 6663 × 9 which equals 59967
+ 6663 × 30 what gives us 199890
+ 6663 × 600 yielding 3997800
+ 6663 × 4000 that results in 26652000

= 30909657
