Find a number so that its (3/5) is 18, what is the correct formula listed
求一个数，使它的(3/5)是18，列出的正确算式是多少
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">18 / (3/5)</gadget>
<output>30</output>

<result>30</result>