In a mountaineering competition, Wang Bing went up the mountain at 50 meters per minute, reached the top of the mountain in 12 minutes, and then went down the mountain by the same route, which took 8 minutes. How many meters per minute did Wang Bing walk on average during the whole process of going up and down the mountain?
在一次登山比赛中，王冰上山每分钟走50米，12分钟到达山顶，然后按原路下山，用了8分钟．王冰上山、下山的全过程中平均每分钟走多少米？
<gadget id="calculator">50 * 12 * 2</gadget>
<output>1_200</output>

<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">1_200 / 20</gadget>
<output>60</output>

<result>60</result>