The distance between the two cities is 300 kilometers. A car travels from one city to another. It takes 6 hours to go there and 1 hour less to return. What is the speed of the car when it returns?
两个城市相距300千米，一辆汽车从一座城市驶向另一座城市，去时用了6小时，返回时少用1小时．汽车返回时的速度是多少？
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">300 / 5</gadget>
<output>60</output>

<result>60</result>