On a plan with a scale of 1:1500, the side length of a square land is measured to be 20 cm. What is the actual area of the land in square meters?
在一幅比例尺是1：1500的平面图上，量得一块正方形地的边长是20厘米，这块地的实际面积是多少平方米？
<gadget id="calculator">1 / 1_500</gadget>
<output>1/1_500 = around 0.000667</output>

<gadget id="calculator">20 / (1/1_500) / 100</gadget>
<output>300</output>

<gadget id="calculator">300 * 300</gadget>
<output>90_000</output>

<result>90_000</result>