On a map with a scale of 1:400000, the distance between A and B is 6 cm. What is the actual distance between A and B in kilometers?
在比例尺是1：400000的地图上，量得甲乙两地距离是6厘米．甲乙两地的实际距离约是多少千米？
<gadget id="calculator">1 / 400_000</gadget>
<output>1/400_000 = around 0.000002</output>

<gadget id="calculator">6 / (1/400_000) / 100_000</gadget>
<output>24</output>

<result>24</result>