Among the three fractions (1/7), (1/8) and (2/7), what is the largest fraction
在(1/7)﹑(1/8)和(2/7)这三个分数中，最大的分数是多少
<gadget id="calculator">7 / 1</gadget>
<output>7</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>