Take a square iron billet with a side length of 3dm, and forge it into a cuboid steel with a bottom side length of 0.2dm and a length of 22.5dm. How many pieces can be forged at most?
把一块棱长是3dm得正方体铁坯，锻成底面边长是0.2dm，长22.5dm的长方体钢材，最多可以锻造多少根？
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