The school art team has to form a square performance. The outermost layer is 48 people. How many people are there on each side of the outermost layer?
学校文艺队要排成一个方正表演节目，最外层的人数是48人，请问方阵最外层每边有多少人人．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

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

<result>13</result>