In (1/3), (1/2), (5/9), (7/12), (3/5), (11/18)... what is the 100th number?
在(1/3)、(1/2)、(5/9)、(7/12)、(3/5)、(11/18)…这列数中，第100个数是多少．
<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">200 - 1</gadget>
<output>199</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">199 / 300</gadget>
<output>199/300 = around 0.663333</output>

<result>199/300 = around 0.663333</result>