A car travels from city A to city B at a speed of 70 kilometers per hour. It takes 6 hours to get there, and it takes 8 hours to return from city B. How many kilometers per hour does this car travel between cities A and B on average?
一辆汽车以每小时70千米的速度，从甲城开往乙城，6小时到达，从乙城返回时用了8小时，这辆汽车往返于甲乙两城平均每小时行多少千米？
<gadget id="calculator">6 + 8</gadget>
<output>14</output>

<gadget id="calculator">2 / 14</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">70 * 6 * (1/7)</gadget>
<output>60</output>

<result>60</result>