Decorate a room, the length and width is 3.6 meters, the height is 2.5 meters, the door and window area is 10 square meter, and the wall of the room is pasted with wallpaper. What are the minimum requirements? If it's just a math problem, it's a 3.6*2.5*4- 10=26 (square meter) four-sided wall sticker. Remove the soles of the feet and the roof, so it is four sides. Subtract the area of doors and windows.

If we consider the reality, it must be more than 26 square meters. Because we have to consider how to cut paper to adapt to the wall, but also beautiful, impossible to tinker, to reduce the area of paper and so on. So we should seek truth from facts and connect with reality. Combine theory with practice!