The third grade students went to work, 32 boys and 28 girls. If every 3 people are divided into groups, how many groups can be divided in total?
三年级同学去劳动，男生32人，女生28人．如果每3人分成一组，一共可以分多少组？
<gadget id="calculator">32 + 28</gadget>
<output>60</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<result>20</result>