On a map with a scale of 1:4000000, the distance between A and B is 6 cm. How many kilometers is the actual distance between A and B?
在比例尺是1：4000000的地图上，量得甲、乙两地相距6厘米，甲、乙两地实际距离多少千米？
<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>