On a plane plan with a scale of 1:1000, measure a rectangle with a length of 6 cm and a width of 4 cm. What is its actual area in square meters?
在比例尺1：1000的平面图上，量得一块长方形地长6厘米，宽4厘米，它的实际面积是多少平方米．
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">4 / (1/1_000) / 100</gadget>
<output>40</output>

<gadget id="calculator">6 / (1/1_000) / 100</gadget>
<output>60</output>

<gadget id="calculator">40 * 60</gadget>
<output>2_400</output>

<result>2_400</result>