The distance between A and B is 300 kilometers. The distance between A and B is 6 cm on a map, and the distance between B and C is 5 cm on this map. ． What is the actual distance in kilometers between cities B and C?
甲、乙两城相距300千米，在一幅地图上量得甲、乙两城之间的距离是6厘米，同时在这幅图上量得乙、丙两城之间的距离是5厘米．乙、丙两城之间的实际距离是多少千米？
<gadget id="calculator">300 * 100_000</gadget>
<output>30_000_000</output>

<gadget id="calculator">6 / 30_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">5 / (1/5_000_000) / 100_000</gadget>
<output>250</output>

<result>250</result>