On a map with a scale of 1:5,000,000, the distance from Beijing to Shanghai is 24 cm. On another map with a scale of 1:30,000,000, what is the distance from Beijing to Shanghai?
在一幅比例尺尺为1：5000000图上，量得北京到上海的距离是24厘米，在另外一幅比例尺为1：30000000的地图上，北京到上海的距离又是多少呢？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">24 / (1/5_000_000)</gadget>
<output>120_000_000</output>

<gadget id="calculator">1 / 30_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">120_000_000 * (1/30_000_000)</gadget>
<output>4</output>

<result>4</result>