No problem, we've got 6663 and 2163 to multiply
6663 × 2163 = 2163 × (6663)
+ 2163 × 3 giving us 6489
+ 2163 × 60 yielding 129780
+ 2163 × 600 giving us 1297800
+ 2163 × 6000 giving us 12978000

= 14412069
