The perimeter of a rectangle is 48 cm, and the ratio of width to length is 3:5. Find the area of the rectangle in square centimeters.
长方形的周长为48厘米，宽长的比为3：5，求这个长方形的面积是多少平方厘米．
<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">24 * (5/8)</gadget>
<output>15</output>

<gadget id="calculator">24 - 15</gadget>
<output>9</output>

<gadget id="calculator">15 * 9</gadget>
<output>135</output>

<result>135</result>