On a design drawing with a scale of 1:1000, there is a rectangular building. The measured length of the building is 6 cm and the width is 4 cm. What is the actual area of the building in square meters?
在一张比例尺是1：1000的设计图上，有一个长方形建筑物，量得建筑物的长是6厘米，宽是4厘米．这个建筑物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">6 / (1/1_000) / 100</gadget>
<output>60</output>

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

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

<result>2_400</result>