On a map with a scale of 1:600000, the distance between A and B is 12 cm. What is the actual distance between A and B in kilometers?
在一幅比例尺是1：600000的地图上，量得甲、乙两地的距离是12厘米，甲、乙两地的实际距离是多少千米．
<gadget id="calculator">1 / 600_000</gadget>
<output>1/600_000 = around 0.000002</output>

<gadget id="calculator">12 / (1/600_000) / 100_000</gadget>
<output>72</output>

<result>72</result>