1π=3.14 以此類推1 π= 3.14 2 π= 6.28 3 π= 9.42 4 π= 12.56 5 π= 15.7 6 π= 18.84 7 π= 21.98 8 π= 25.12 9 π= 28.26 10 π= 31.4 11 π= 34.54 12 π= 37.68 13 π= 40.82 14 π= 43.96 15 π= 47.1 16 π= 50.24 17 π= 53.38 18 π= 56.52 19 π= 59.66 20 π= 62.8 21 π= 65.94 22 π= 69.08 23 π= 72.22 24 π= 75.36 25 π= 78.5 26 π= 81.64 27 π= 84.78 28 π= 87.92 29 π= 91.06 30 π= 94.2 31 π= 97.34 32 π= 100.48 33 π= 103.62 34 π= 106.76 35 π= 109.9 36 π= 113.04 37 π= 116.18 38 π= 119.32 39 π= 122.46 40 π= 125.6 41 π= 128.74 42 π= 131.88 43 π= 135.02 44 π= 138.16 45 π= 141.3 46 π= 144.44 47 π= 147.58 48 π= 150.72 49 π= 153.86 50 π= 157 51 π= 160.14 52 π= 163.28 53 π= 166.42 54 π= 169.56 55 π= 172.7 56 π= 175.84 57 π= 178.98 58 π= 182.12 59 π= 185.26 60 π= 188.4 61 π= 191.54 62 π= 194.68 63 π= 197.82 64 π= 200.96 65 π= 204.1 66 π= 207.24 67 π= 210.38 68 π= 213.52 69 π= 216.66 70 π= 219.8 71 π= 222.94 72 π= 226.08 73 π= 229.22 74 π= 232.36 75 π= 235.5 76 π= 238.64 77 π= 241.78 78 π= 244.92 79 π= 248.06 80 π= 251.2 81 π= 254.34 82 π= 257.48 83 π= 260.62 84 π= 263.76 85 π= 266.9 86 π= 270.04 87 π= 273.18 88 π= 276.32 89 π= 279.46 90 π= 282.6 91 π= 285.74 92 π= 288.88 93 π= 292.02 94 π= 295.16 95 π= 298.3 96 π= 301.44 97 π= 304.58 98 π= 307.72 99 π= 310.86 100 π