The distance between A and B is 250 kilometers. The distance between A and B is 5 cm on a map, and the distance between B and C is 3 cm on this map. ． What is the actual distance in kilometers between cities B and C?
甲、乙两城相距250千米，在一幅地图上量得甲、乙两城之间的距离是5厘米，同时在这幅图上量得乙、丙两城之间的距离是3厘米．乙、丙两城之间的实际距离是多少千米？
<gadget id="calculator">250 * 100_000</gadget>
<output>25_000_000</output>

<gadget id="calculator">5 / 25_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">3 / (1/5_000_000) / 100_000</gadget>
<output>150</output>

<result>150</result>