Among the three fractions (1/17), (1/7) and (3/7), what is the largest
在(1/17)、(1/7)和(3/7)这三个分数中，最大的是多少
<gadget id="calculator">7 / 1</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>