On a map with a scale of 1:5000000, the distance between A and B is 2.5 cm. What is the actual distance in kilometers between A and B?
在比例尺是1：5000000的地图上，量得甲、乙两地之间的距离是2.5厘米．甲、乙两地间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">2.5 / (1/5_000_000) / 100_000</gadget>
<output>125</output>

<result>125</result>