No problem, we've got 4003 and 1673 to multiply
4003 × 1673 = 1673 × (4003)
+ 1673 × 3 which equals 5019
+ 1673 × 00 producing 0
+ 1673 × 000 what gives us 0
+ 1673 × 4000 yielding 6692000

= 6697019
