On a map with a scale of 1:2000000, the distance between A and B is 3 cm. What is the actual distance between A and B in kilometers?
在一幅比例尺是1：2000000地图上量得甲乙两地的距离是3厘米，甲乙两地的实际距离是多少千米．
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">3 / (1/2_000_000) / 100_000</gadget>
<output>60</output>

<result>60</result>