The fifth grade students participated in the broadcasting exercise competition. They lined up in 5 columns. The length of the team was 20 meters, and the distance between the front and back rows was 1 meter.
五年级学生参加广播操比赛，排了5路纵队，队伍长20米，前后两排相距1米，六年级有学生多少人．
<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">20 + 1</gadget>
<output>21</output>

<gadget id="calculator">21 * 5</gadget>
<output>105</output>

<result>105</result>