The school playground is 58 meters long and 30 meters wide. Now it is necessary to remodel the playground so that the area of the rebuilt playground is twice the original size. How many remodeling plans are there? Please design it.
学校操场的长58米，宽30米．现在要改建操场，使改建操场，使改建后的操场的面积是原来的2倍，有几种改建方案？请你设计一下．
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