On a map with a scale of (1/400000), the distance between A and B on the map is 12 cm. What is the actual distance between A and B?
在比例尺为(1/400000)的地图上，量得甲，乙两地的图上距离为12厘米，甲，乙两地实际相距多少．
<gadget id="calculator">1 / 400_000</gadget>
<output>1/400_000 = around 0.000002</output>

<gadget id="calculator">12 / (1/400_000) / 100_000</gadget>
<output>48</output>

<result>48</result>