No problem, we've got 3005 and 6303 to multiply
3005 × 6303 = 6303 × (3005)
+ 6303 × 5 what gives us 31515
+ 6303 × 00 giving us 0
+ 6303 × 000 giving us 0
+ 6303 × 3000 giving us 18909000

= 18940515
