Li Qiang rides a bicycle from place A to place B, traveling 12 kilometers per hour, and arrives in 5 hours. When returning from place B to place A, he spends an extra hour due to headwinds. How many kilometers per hour does he travel on average when returning?
李强骑自行车从甲地到乙地，每小时行12千米，5小时到达，从乙地返回甲地时因逆风多用1小时，返回时平均每小时行多少千米？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">12 * (5/6)</gadget>
<output>10</output>

<result>10</result>