A rectangular piece of land is drawn on the map with a scale of 1:200. The circumference of this circle is 24 cm, and the actual ratio of length to width is 5:3. How many square meters is the actual area of this piece of land?
一块长方形地用1：200的比例尺画在图上，这个圆的周长是24厘米，实际的长与宽的比是5：3，这块地的实际面积是多少平方米？
<gadget id="calculator">24 / 2</gadget>
<output>12</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">1 / 200</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">(5/8) / (1/200) / 100</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) / (1/200) / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">12 * (5/4) * 12 * (3/4)</gadget>
<output>135</output>

<result>135</result>