On a drawing with a scale of 1:1000, a rectangle is 8 cm long and 4 cm wide. What is the actual size of the land?
在比例尺是1：1000的图纸上一块长方形地长为8厘米，宽为4厘米．这块地的实际面积是多少？
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">8 / (1/1_000) / 100</gadget>
<output>80</output>

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

<gadget id="calculator">80 * 40</gadget>
<output>3_200</output>

<result>3_200</result>