48 students are playing games on the playground. Everyone forms a square with equal numbers on each side. There are people at the four vertices, and how many students are there on each side.
48名学生在操场做游戏．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">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 + 1</gadget>
<output>13</output>

<result>13</result>