#### \(90\pi\) ç«æ¹ã¡ã¼ãã«, \(78\pi\) å¹³æ¹ã¡ã¼ãã«
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- → 32000 → 16000 → 8000 → 4000 → 2000 → 1000 → 500 → 250 → 125 → 62.5? — not integer.
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- ä¸å¿ã \((h, k)\) ã§åå¾ã \(r\) ã®åã®æ¹ç¨å¼ã¯æ¬¡ã®ã¨ããã§ã:
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