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Zu's ratio (approximate ratio of the circumference of a circle to its diameter as calculated by Zu Chongzhi during the Southern and Northern Dynasties period: between 3.1415926 and 3.1415927)
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n.
Zu's ratio (approximate ratio of the circumference of a circle to its diameter as calculated by Zu Chongzhi during the Southern and Northern Dynasties period: between 3.1415926 and 3.1415927)
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