The ratio of length to width of a rectangle is 5:3, the length is 18 cm, and the width is in cm.
长方形的长与宽的比是5：3，长是18厘米，宽是多少厘米．
<gadget id="calculator">18 / 5</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">(18/5) * 3</gadget>
<output>54/5 = around 10.8</output>

<result>54/5 = around 10.8</result>