class Area:
    # 円周率を準備
    PI = 3.14

    @classmethod
    def circle(cls, radius):
        return radius * radius * cls.PI

if __name__ == '__main__':
    print(Area.PI)
    print(Area.circle(10))

ce28ff056c0b2351bcc64f67fc3074e1dc673d4e
class Area:
    <mask token>
    <mask token>


<mask token>

class Area:
    <mask token>

    @classmethod
    def circle(cls, radius):
        return radius * radius * cls.PI


<mask token>

class Area:
    PI = 3.14

    @classmethod
    def circle(cls, radius):
        return radius * radius * cls.PI


<mask token>

class Area:
    PI = 3.14

    @classmethod
    def circle(cls, radius):
        return radius * radius * cls.PI


if __name__ == '__main__':
    print(Area.PI)
    print(Area.circle(10))

class Area:
    # 円周率を準備
    PI = 3.14

    @classmethod
    def circle(cls, radius):
        return radius * radius * cls.PI

if __name__ == '__main__':
    print(Area.PI)
    print(Area.circle(10))
