On a map with a scale of 1:25000, the measured distance between the two places is 2.8 cm. What is the actual distance in kilometers between the two places?
在比例尺是1：25000的地图上，量得两地的距离是2.8厘米，两地的实际距离是多少千米．
<gadget id="calculator">1 / 25_000</gadget>
<output>1/25_000 = around 0.00004</output>

<gadget id="calculator">2.8 / (1/25_000) / 100_000</gadget>
<output>0.7</output>

<result>0.7</result>