The distance between AB and AB measured on a map with a scale of 1:25000000 is 4 cm. What is the actual distance between AB and AB in kilometers?
在比例尺是1：25000000的地图上量得AB两地的距离是4厘米，AB两地的实际距离是多少千米．
<gadget id="calculator">4 / 100_000</gadget>
<output>1/25_000 = around 0.00004</output>

<gadget id="calculator">25_000_000 * (1/25_000)</gadget>
<output>1_000</output>

<result>1_000</result>