A train departs from City A, passes through City B to City C, and travels a total of 715 kilometers. It takes 4 hours to travel from City A to City B, and 7 hours to travel from City B to City C. How many kilometers does it travel on average per hour?
一列火车从甲城出发，经过乙城去丙城，共行715千米，从甲城到乙城用4小时，从乙城到丙城用7小时，平均每小时行多少千米？
<gadget id="calculator">4 + 7</gadget>
<output>11</output>

<gadget id="calculator">715 / 11</gadget>
<output>65</output>

<result>65</result>