On the map of China with a scale of 1:6000000, the distance between A and B is 4.5 cm. What is the actual distance between A and B in kilometers?
在比例尺是1：6000000的中国地图上，量得甲、乙两地的距离是4.5厘米，甲、乙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">4.5 / (1/6_000_000) / 100_000</gadget>
<output>270</output>

<result>270</result>