On a map with a scale of 1:3000000, the distance between A and B on the map is 9 cm. What is the actual distance in kilometers between A and B?
在比例尺是1：3000000的地图上，量得甲、乙两地之间的图上距离是9厘米，甲、乙两地之间的实际距离是多少千米？
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">9 / (1/3_000_000) / 100_000</gadget>
<output>270</output>

<result>270</result>