The perimeter of a rectangle is 48 cm, and the ratio of length to width is 5:3. What is the area of the rectangle in square centimeters?
一个长方形的周长是48厘米，长与宽的比是5：3，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">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">24 * (3/8)</gadget>
<output>9</output>

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

<result>135</result>