On a map with a scale of 1:60000000, the distance between A and B on the map is 2.5 cm, so how many kilometers is the actual distance between A and B?
在比例尺是1：60000000的地图上量得甲乙两地的图上距离是2.5厘米，那么甲乙两地的实际距离是多少千米．
<gadget id="calculator">1 / 60_000_000</gadget>
<output>1/60_000_000 = around 0</output>

<gadget id="calculator">2.5 / (1/60_000_000) / 100_000</gadget>
<output>1_500</output>

<result>1_500</result>