On a 1:6,000,000 map, the distance between two cities is measured to be 5 centimeters. What is the actual distance in kilometers between the two cities?
在一幅1：6000000地图上，量得两个城市之间的距离是5厘米，两城市之间的实际距离是多少千米．
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

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

<result>300</result>