On a map with a scale of (1/4000), if the distance between A and B is 2.5 cm, what is the actual distance between A and B in meters?
在比例尺是(1/4000)的地图上，量得甲、乙两地的距离是2.5厘米，则甲、乙两地的实际距离是多少米．
<gadget id="calculator">1 / 4_000</gadget>
<output>1/4_000 = around 0.00025</output>

<gadget id="calculator">2.5 / (1/4_000)</gadget>
<output>10_000</output>

<gadget id="calculator">10_000 / 100</gadget>
<output>100</output>

<result>100</result>