On the map with a scale of 1:3000000, the distance between A and B is measured as 5cm. What is the actual distance in kilometers between the two places?
在比例尺为1：3000000的图上，量得甲乙两地的距离为5cm，两地的实际距离是多少千米．
<gadget id="calculator">3_000_000 / 100_000</gadget>
<output>30</output>

<gadget id="calculator">5 * 30</gadget>
<output>150</output>

<result>150</result>