The third-grade students went to work in the tea garden. There were 31 girls and 26 boys. The three students were divided into groups. How many groups can they be divided into?
三年级的学生去茶园里劳动，女生有31人，男生有26人，3名学生分成一组，一共可以分成几组？
<gadget id="calculator">31 + 26</gadget>
<output>57</output>

<gadget id="calculator">57 / 3</gadget>
<output>19</output>

<result>19</result>