On a map with a scale of 1:150,000, the distance between Zhangzhuang and Shaxian on the map is 12 cm. What is the actual distance between Zhangzhuang and Shaxian in kilometers?
在一幅比例尺是1：150000的地图上，量得张庄和沙县的图上距离12厘米，张庄和沙县的实际距离是多少千米．
<gadget id="calculator">150_000 / 100_000</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">12 * (3/2)</gadget>
<output>18</output>

<result>18</result>