A car from A to B travels 300 kilometers in the morning and 240 kilometers in the afternoon. It takes 6 hours. How many kilometers per hour does the car travel on average?
一辆从甲地开往乙地的汽车，上午行驶了300千米，下午行驶了240千米，共用了6个小时，这辆汽车平均每小时行驶多少千米？
<gadget id="calculator">300 + 240</gadget>
<output>540</output>

<gadget id="calculator">540 / 6</gadget>
<output>90</output>

<result>90</result>