In the following formula, what is the formula whose result is greater than (2/5) and less than (3/4)
在下面算式中，得数比(2/5)大、比(3/4)小的算式是多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/5) / (3/4)</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>