A car departs from city A at 8:30 in the morning at a speed of 60 kilometers per hour and arrives in city B at 12:30 noon. What is the distance between cities A and B?
一辆汽车上午8时30分以每小时60千米的速度从A城出发，中午12时30分到达B城，A、B两城相距多少．
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<result>240</result>