(2/3)2002方*（1.5）2003方/(-1)2004方
=(2/3)2002方*（3/2）2003方/(1)2004方
=(2/3)2002方*（3/2）2002方*(3/2)/1
=[(2/3)*(3/2)]2002方*(3/2)
=(1)2002方*(3/2)
=1*(3/2)
=1.5