Sequence (1/3), (1/2), (5/9), (7/12), (3/5), (11/18). What is the 2000th fraction in the sequence.
数列(1/3)、(1/2)、(5/9)、(7/12)、(3/5)、(11/18)．数列中第2000个分数是多少．
<gadget id="calculator">2 * 2_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 - 1</gadget>
<output>3_999</output>

<gadget id="calculator">3 * 2_000</gadget>
<output>6_000</output>

<gadget id="calculator">3_999 / 6_000</gadget>
<output>1_333/2_000 = around 0.6665</output>

<result>1_333/2_000 = around 0.6665</result>