There were originally 40 students on the playground, and 25 students came, and every 5 students lined up, how many lines can they line up?
操场上原有学生40人，又走来25人，每5个人排一行，可以排多少行？
<gadget id="calculator">40 + 25</gadget>
<output>65</output>

<gadget id="calculator">65 / 5</gadget>
<output>13</output>

<result>13</result>