Draw a rectangular piece of land on a plan with a scale of 1:500. The length is 10 cm, and the ratio of width to length is 4:5. What is the actual area of the land in square meters?
把一块长方形土地用1：500的比例尺画在平面图上，长是10厘米，宽与长的比是4：5，这块地的实际面积是多少平方米？
<gadget id="calculator">1 / 500</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">10 / (1/500) / 100</gadget>
<output>50</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">10 / (5/9)</gadget>
<output>18</output>

<gadget id="calculator">18 - 10</gadget>
<output>8</output>

<gadget id="calculator">8 / (1/500) / 100</gadget>
<output>40</output>

<gadget id="calculator">50 * 40</gadget>
<output>2_000</output>

<result>2_000</result>