Uncle Li rode a motorcycle from Jiujiang to Sanshui District to deliver goods. It took 40 kilometers per hour to go there, and it took 3 hours to arrive, and it took 2 hours to return the same way. How many kilometers per hour did you travel on average when you returned?
李叔叔骑摩托车从九江出发去三水区送货．去的时候每小时40千米，3小时到达，原路返回时用了2小时．返回时平均每小时行多少千米？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">40 * (3/2)</gadget>
<output>60</output>

<result>60</result>