In (2/5), (1/3) and (4/7), what is the largest fractional unit
在(2/5)、(1/3)和(4/7)中，分数单位最大的是多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>