During the Ching Ming Festival holiday, my mother took Xiao Ming to climb the mountain. The distance from the foot of the mountain to the top was 360 meters. It took them 3 hours to go up the mountain and 2 hours to go down the mountain. What is their average speed for going up and down the mountain?
清明节假期，妈妈带小明去爬山，从山脚到山顶有360米，他们上山用了3小时，下山用了2小时，他们上下山的平均速度是多少？
<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">360 * (2/5)</gadget>
<output>144</output>

<result>144</result>