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こんなかんじ gosh> ,u math.const gosh> ,d pi 3.141592653589793 is an instance of class <real> mantissa: #x+19_21fb_5444_2d18 exponent: -51 hex: #x4009_21fb_5444_2d18 (exact 3.141592653589793) is 245850922/78256779 gosh>