a*b*c = 129960(a+b+c), a*b*d = 108300(a+b+d), a*c*d = 584820(a+c+d), b*c*d = 307800(b+c+d).
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
