On a map with a scale of 1:6,000,000, the distance from Nanjing to Beijing is 15 cm. What is the actual distance in kilometers from Nanjing to Beijing?
在比例尺是1：6000000的地图上，量得南京到北京的距离是15厘米，南京到北京的实际距离是多少千米
<gadget id="calculator">9_000_000 / 10_000</gadget>
<output>900</output>

<result>900</result>