If a is a natural number (a>1), the largest result of the following formula is a/how much
如果a是自然数(a＞1)，下列算式结果最大的是a/多少
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>