On the drawing with a scale of 1:100, the area of a triangular lawn is calculated to be 3 square centimeters, what is its actual area?
在比例尺为1：100的图纸上，测算得一个三角形草坪的面积是3平方厘米，则它的实际面积是多少．
<gadget id="calculator">3 / 10_000</gadget>
<output>3/10_000 = around 0.0003</output>

<gadget id="calculator">10_000 * (3/10_000)</gadget>
<output>3</output>

<result>3</result>