If mouth is a natural number not equal to 0. Among the following three calculation formulas, a/how much has the largest number.
如果口是不为0的自然数．下面三个算式中，a/多少的得数最大．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>