On a map with a scale of 1:2500000, the measured distance between A and B is 1.7cm. How many kilometers is the actual distance between A and B?
在一幅比例尺是1：2500000的地图上，量得甲乙两地的距离是1.7cm，甲乙两地的实际距离是多少千米？
<gadget id="calculator">1 / 2_500_000</gadget>
<output>1/2_500_000 = around 0</output>

<gadget id="calculator">1.7 / (1/2_500_000) / 100_000</gadget>
<output>42.5</output>

<result>42.5</result>