There are 40 students playing games. Everyone forms a square with the same number of people on each side. There are people at the four vertices. How many students are there on each side?
有40名学生做游戏．大家围成一个正方形，每边人数相等，四个顶点都有人，每边各有多少名学生．
<gadget id="calculator">40 + 4</gadget>
<output>44</output>

<gadget id="calculator">44 / 4</gadget>
<output>11</output>

<result>11</result>