Uncle Wang drove from Yinchuan to Zhongwei for business. The average speed was 80 km/h, and it took 3 hours. If it only took 2 hours to return along the original road, what was the average speed when returning?
王叔叔开车从银川到中卫办事，去时的平均速度是80千米/时，一共用了3小时，如果回来时沿原路返回只用了2小时，返回时的平均速度是多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">80 * (3/2)</gadget>
<output>120</output>

<result>120</result>