Uncle Li drove from the county seat to Wangzhuang to deliver fertilizers. He traveled 60 kilometers per hour when he went there, arrived in 4 hours, and took 3 hours to return. How many kilometers per hour did he travel on average when he returned?
李叔叔从县城开车去王庄送化肥，去时每小时行60千米，4小时到达，返回时用了3小时，返回时平均每小时行多少千米？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 * (4/3)</gadget>
<output>80</output>

<result>80</result>