Uncle Li drove from home to the county town to pull fertilizer. It took 4 hours to drive 60 kilometers per hour when he went there, and 5 hours when he came back. How many kilometers per hour did you travel on average when you came back?
李叔叔开车从家去县城拉化肥，去时每小时行60千米，用了4小时，回来时用了5小时．回来时平均每小时行多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<result>48</result>