Now the school wants to lay a rectangular lawn. The perimeter of this rectangular lawn is 20 meters, and the ratio of length to width is 3:2. What is the area of this rectangular lawn in square meters?
现学校要铺一个长方形的草地，这个长方形草地的周长是20米，长与宽的比是3：2，这个长方形草地的面积是多少平方米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">10 * (3/5)</gadget>
<output>6</output>

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

<gadget id="calculator">10 * (2/5)</gadget>
<output>4</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>