Uncle Wang once climbed a mountain. The distance from the foot of the mountain to the top of the mountain was 360 meters. It took him 5 minutes to go up the mountain and only 4 minutes to go down the mountain. Please calculate the average speed of Uncle Wang's climbing this time.
王大伯有一次爬山，从山脚到山顶的路程是360米，他上山用了5分，下山只用了4分．请你计算出王大伯这次爬山的平均速度．
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">360 * (2/9)</gadget>
<output>80</output>

<result>80</result>