The third grade students are going to plant trees. There are 64 boys and 56 girls. Every 4 students are divided into groups. How many groups can they be divided into?
三年级学生去植树，男生64人，女生56人，每4人分成一组，一共可以分成多少组？
<gadget id="calculator">64 + 56</gadget>
<output>120</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<result>30</result>