On a map with a scale of 1:30000000, the measured distance between A and B is 5 cm, so how many kilometers is the actual distance from A to B?
在一幅比例尺是1：30000000的地图上，量的甲乙两地的距离是5厘米，那么甲地到乙地的实际距离是多少千米．
<gadget id="calculator">1 / 30_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">5 / (1/30_000_000) / 100_000</gadget>
<output>1_500</output>

<result>1_500</result>