On a 1:6000000 map, the distance between A and B is 3 cm. What is the actual distance between A and B in kilometers?
在一幅1：6000000的地图上，量得A、B两地的距离是3厘米，A、B两地的实际距离是多少千米．
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">3 / (1/6_000_000) / 100_000</gadget>
<output>180</output>

<result>180</result>