When a>0, the calculation result of the following formulas is greater than a is a/how much
当a＞0时，下列各式的计算结果大于a的是a/多少
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

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