On a map with a scale of 1:4000000, the distance between the two places is 6 cm. What is the actual distance in kilometers between the two places?
在比例尺是1：4000000的地图上量得两地之间的距离是6厘米，这两地实际距离是多少千米．
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">6 / (1/4_000_000) / 100_000</gadget>
<output>240</output>

<result>240</result>