Solution ratio: (18/(x))=27:2.
解比例：(18/(x))=27：2．
<gadget id="calculator">27 / 2</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">18 / (27/2)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>