The perimeter of a rectangular playground is 480 meters, and the ratio of length to width is 5:3. What is the area of the playground in square meters?
一长方形操场的周长是480米，长与宽的比是5：3，这个操场的面积是多少平方米．
<gadget id="calculator">3 + 5 + 3 + 5</gadget>
<output>16</output>

<gadget id="calculator">480 / 16</gadget>
<output>30</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">90 * 150</gadget>
<output>13_500</output>

<result>13_500</result>