There are 20 boys and 16 girls in the big class of kindergarten. If the activities are divided into groups, and the boys and girls in each group are equal, how many groups can be divided at most?
幼儿园大班有男孩20名，女孩16名，如果分组活动，并且每组的男孩、女孩都分别相等，最多能分多少组．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>