北京故宫的占地面积是720000平方米,合多少公顷?6|'f9s5G'S;`6g4J0i;t:u.U4?
算式:提示,Y3\:{0V9f-J5P.h6|'f9s5G'S;`6g4J0i;t:u.U4?
答:合1l,I'k3{5D,k3M;?,_1B8u8{公顷。6|'f9s5G'S;`6g4J0i;t:u.U4?