If a is any natural number greater than 1, then the largest number in the following formulas is a/how many
如果a是一个大于1的任意自然数，那么下面各式中得数最大的是a/多少
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>