1兀 3.142兀 6.283兀 9.424兀 12.565兀 15.76兀 18.847兀 21.988兀 25.129兀 28.2610兀 31.411兀 34.5412兀 37.6813兀 40.8214兀 43.9615兀 47.116兀 50.2417兀 53.3818兀 56.5219兀 59.6620兀 62.8
