There is a column of numbers: (1/3), (1/2), (5/9), (7/12), (3/5), (11/18), (13/21), ... then 2011 What is the score.
有一列数：(1/3)，(1/2)，(5/9)，(7/12)，(3/5)，(11/18)，(13/21)，…则第2011个分数是多少．
<gadget id="calculator">2 * 2_011</gadget>
<output>4_022</output>

<gadget id="calculator">4_022 - 1</gadget>
<output>4_021</output>

<gadget id="calculator">3 * 2_011</gadget>
<output>6_033</output>

<gadget id="calculator">4_021 / 6_033</gadget>
<output>4_021/6_033 = around 0.666501</output>

<result>4_021/6_033 = around 0.666501</result>