If the area of a rectangular piece of land drawn on a drawing with a scale of (1/200) is 40 square centimeters, what is its actual area in square meters?
一块长方形土地画在一幅比例尺是(1/200)的图纸上的面积是40平方厘米，则它的实际面积是多少平方米．
<gadget id="calculator">40 / 10_000</gadget>
<output>1/250 = around 0.004</output>

<gadget id="calculator">40_000 * (1/250)</gadget>
<output>160</output>

<result>160</result>