On a map with a scale of 1:9000000, the distance between the two places is 5 cm. If it is drawn on a map with a scale of 1:3000000, what is the distance in centimeters between the two places?
在一幅比例尺是1：9000000的地图上测得两地的图上距离是5厘米，如果把它画在1：3000000的地图上，两地的图上距离是多少厘米．
<gadget id="calculator">1 / 9_000_000</gadget>
<output>1/9_000_000 = around 0</output>

<gadget id="calculator">5 / (1/9_000_000)</gadget>
<output>45_000_000</output>

<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">45_000_000 * (1/3_000_000)</gadget>
<output>15</output>

<result>15</result>