On the school plan with a scale of 1:1000, the length of the playground is 8 cm and the width is 5 cm. What is the actual area of the playground in square meters?
在比例尺是1：1000的学校平面图上，量得操场的长是8厘米，宽是5厘米，操场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">8 / (1/1_000) / 100</gadget>
<output>80</output>

<gadget id="calculator">5 / (1/1_000) / 100</gadget>
<output>50</output>

<gadget id="calculator">80 * 50</gadget>
<output>4_000</output>

<result>4_000</result>