下边是数学小组制作的一个指示牌。现在想给它的正反两面刷上油漆，若每平方厘米用油漆0.5克，共需油漆多少克？8s/i:H0^:C4W5x4R9A:K2?'h8j2C*L7W5x
8s/i:H0^:C4W5x4R9A:K2?'h8j2C*L7W5x
算式：提示-W)L/@4r'p2u2P/e,i8s/i:H0^:C4W5x4R9A:K2?'h8j2C*L7W5x
答：共需油漆多少.{7Q;l7F2Z4X)O3Y2]:Y.a:s-o9W克。8s/i:H0^:C4W5x4R9A:K2?'h8j2C*L7W5x