Uncle Wang drives from A to B at 80 kilometers per hour and arrives in 1.5 hours. It takes 2 hours to go back the same way. How many kilometers per hour did you travel when you returned?
王叔叔开车从甲地到乙地，每小时行80千米，1.5小时到达．原路返回时用2小时．返回时，每小时行多少千米？
<gadget id="calculator">1.5 / 2</gadget>
<output>0.75</output>

<gadget id="calculator">80 * 0.75</gadget>
<output>60</output>

<result>60</result>