A cuboid swimming pool is 20 meters long, 18 meters wide, and 2.5 meters deep. If cement is plastered on the four walls, what is the area in square meters to plaster the cement?
一个长方体的游泳池，长20米，宽18米，水深2.5米，如在四壁抹水泥，求抹水泥的面积是多少平方米？
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