A car travels from A to B for 6 hours, 240 kilometers in the first 4 hours, and 150 kilometers in the next 2 hours. How many miles per hour does the car travel on average.
一辆汽车从甲地到乙地行驶了6个小时，前4小时行驶了240千米，后2小时行驶了150千米．这辆汽车全程平均每小时行驶多少千米．
<gadget id="calculator">240 + 150</gadget>
<output>390</output>

<gadget id="calculator">390 / 6</gadget>
<output>65</output>

<result>65</result>