Uncle Wang drove from the county seat to Wangzhuang Township to deliver fertilizer. It took 3 hours to go and 2 hours to return. It is known that the speed when going is 40 km/h, how many kilometers per hour is the average travel when returning?
王叔叔从县城开车去王庄乡送化肥．去的时候用了3小时，返回时用了2小时．已知去时的速度是40千米/时，求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>