In the 1500-meter race, Xiaoli ran for 9.7 minutes, and Xiaoyu took 2 minutes longer than Xiaoli. How many minutes does Xiaoyu need per kilometer on average?
1500米赛跑，小丽跑了9.7分钟，小雨比小丽多用了2分钟，小雨平均每千米需多少分钟？
<gadget id="calculator">9.7 + 2</gadget>
<output>11.7</output>

<gadget id="calculator">1_500 / 1_000</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">11.7 / (3/2)</gadget>
<output>7.8</output>

<result>7.8</result>