Among (2/3), (3/5), (5/7), (7/9), (9/11), what is the third largest number?
(2/3)、(3/5)、(5/7)、(7/9)、(9/11)中，第三大的数是多少．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>