No problem, we've got 4006 and 1573 to multiply
4006 × 1573 = 1573 × (4006)
+ 1573 × 6 what gives us 9438
+ 1573 × 00 producing 0
+ 1573 × 000 resulting in 0
+ 1573 × 4000 yielding 6292000

= 6301438
