No problem, we've got 1666 and 4013 to multiply
1666 × 4013 = 4013 × (1666)
+ 4013 × 6 that equals 24078
+ 4013 × 60 that equals 240780
+ 4013 × 600 yielding 2407800
+ 4013 × 1000 what gives us 4013000

= 6685658
