In the 1:2000000 map, the distance between A and B is 3 cm, so how many kilometers is the actual distance between A and B?
在1：2000000图中，量得A、B两地相距3厘米，那么A、B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>