Uncle Wang drove from the county seat to Wangzhuang to deliver fertilizer. It took 6 hours to go 40 kilometers per hour, and only 5 hours to return. How many kilometers per hour did you travel on average when you returned?
王叔叔从县城开车去王庄送化肥．去的时候每小时行40千米，用了6小时，返回时只用了5小时．返回时平均每小时行多少千米？
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">40 * (6/5)</gadget>
<output>48</output>

<result>48</result>