A passenger car travels 180 kilometers in 3 hours. According to this speed, it can reach Beijing from Jinan in 12 hours. How many kilometers is the distance between Jinan and Beijing?
一辆客车3小时行驶了180千米，照这样的速度12小时可以从济南到达北京，济南与北京的距离是多少千米？
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">60 * 12</gadget>
<output>720</output>

<result>720</result>