During the small community volunteer activities, students from the three teams of Class 4A picked up 252 mineral water bottles in total. If each team consists of 7 students, how many mineral water bottles did each person pick up on average?
在社区小义工活动中，四甲班的三个小队的同学共捡到252个矿泉水瓶．如果每个小队由7名同学组成，那么平均每人捡到了多少个矿泉水瓶？
<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">252 / 21</gadget>
<output>12</output>

<result>12</result>