Analysis: With this package, the length of the cuboid remains unchanged, and the width and height are expanded by 2 times. Now the width is 6×2= 12cm, and the height is 3 right 1/2×2=7cm. According to the surface area formula of cuboid: (length× width+length× height+width× height) ×2, the area of wrapping paper can be calculated. The formula is (9 right 1/2× 12+9 right1/2× 7+12× 7) × 2 = 529 cm2.