The distance from the bottom of the mountain to the top of the mountain is 378 meters. It took 18 minutes to go up the mountain and 14 minutes to go down the mountain. What is the average speed of going up and down the mountain?
从山下到山顶有378米，上山用了18分钟，下山用了14分钟，上下山的平均速度是多少．
<gadget id="calculator">378 * 2</gadget>
<output>756</output>

<gadget id="calculator">18 + 14</gadget>
<output>32</output>

<gadget id="calculator">756 / 32</gadget>
<output>189/8 = around 23.625</output>

<result>189/8 = around 23.625</result>