The kindergarten teacher distributes candies to the three groups of students. If only the first group is distributed equally, each student will receive 12; if only the second group is distributed equally, each student will receive 15; if only the third group is distributed equally, 20 for each student. So how many points are divided into three groups on average?
幼儿园老师给三组学生分糖果，如果只平均分给第一组，每个学生分12个；如果只平均分给第二组，每个学生分15个；如果只平均分给第三组，每个学生分20个．那么平均分给三个组，则每个学生分多少个？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / (1/4)</gadget>
<output>4</output>

<result>4</result>