The driver, Uncle Wang, set off from Xiamen to deliver goods in Fuzhou. It took 3 hours to go there at a speed of 60 km/h, and it took only 2 hours to return. What is the speed of the round trip to Uncle Wang?
司机王叔叔从厦门出发到福州送货，去的时候用了3小时，速度是60千米/小时，回来只用了2小时，问王叔叔往返的速度是多少？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * 3 * (2/5)</gadget>
<output>72</output>

<result>72</result>