Use a 60 cm long iron wire to form a rectangle. The ratio of the length to width of the rectangle is 3:2. Find the width of the rectangle.
用60厘米长的铁丝围成一个长方形，围成的长方形长和宽的比是3：2，求这长方形的宽．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 2</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 * (1/5)</gadget>
<output>12</output>

<result>12</result>