triangular vegetable field with a base length of 80m and a height of 60m is drawn on a map with a scale of 1:500. What is the area in cm**2?
一块三角形菜地，底长80m，高60m，画在比例尺是1：500的地图上，面积是多少cm**2？
<gadget id="calculator">80 * 100</gadget>
<output>8_000</output>

<gadget id="calculator">1 / 500</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">8_000 * (1/500)</gadget>
<output>16</output>

<gadget id="calculator">60 * 100</gadget>
<output>6_000</output>

<gadget id="calculator">6_000 * (1/500)</gadget>
<output>12</output>

<gadget id="calculator">16 * 12</gadget>
<output>192</output>

<result>192</result>