In the elderly sports meeting, both Uncle Liu and Uncle Li participated in the long-distance running competition. The whole journey was 1.5 kilometers. Uncle Liu took 9.7 minutes to run, and Uncle Li took 2 minutes more than him. How many minutes does Uncle Li take on average to run 1 kilometer?
在老年运动会上，刘大伯和李大伯都参加了长跑比赛，全程1.5千米，刘大伯用了9.7分钟跑完，李大伯比他多用了2分钟，李大伯跑1千米平均需要多少分钟．
<gadget id="calculator">9.7 + 2</gadget>
<output>11.7</output>

<gadget id="calculator">11.7 / 1.5</gadget>
<output>7.8</output>

<result>7.8</result>