On a map with a scale of 1:5000000, the distance from city A to city B is 6 cm. Calculate the actual distance in kilometers from city A to city B?
在比例尺为1：5000000的地图上，量得A到B城的距离是6厘米，算一算A城到B城的实际距离是多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">6 / (1/5_000_000) / 100_000</gadget>
<output>300</output>

<result>300</result>