The perimeter of a rectangular piece of land is 60 meters, and the ratio of length to width is 3:2. What is its area in square meters.
一块长方形地的周长是60米，长和宽的比是3：2．它的面积是多少平方米．
<gadget id="calculator">60 / 2</gadget>
<output>30</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">30 * (3/5)</gadget>
<output>18</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<gadget id="calculator">18 * 12</gadget>
<output>216</output>

<result>216</result>