The distance between the two cities is 800 kilometers. A car drives from city A to city B. After driving for 11 hours, it is still 140 kilometers away from the destination. How many kilometers per hour does the car drive on average?
两座城市相距800千米，一辆汽车从甲城开往乙城，行了11小时后，离目的地还有140千米，这辆汽车平均每小时行多少千米？
<gadget id="calculator">800 - 140</gadget>
<output>660</output>

<gadget id="calculator">660 / 11</gadget>
<output>60</output>

<result>60</result>