On a map with a scale of 1:1000, the base of a triangle is 8 cm and the height is 5 cm. What is the area of the triangle in square meters?
在比例尺是1：1000的地图上，量得一个三角形的底是8厘米，高是5厘米，这个三角形的面积是多少平方米？
<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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">80 * 50 * (1/2)</gadget>
<output>2_000</output>

<result>2_000</result>