The students of a school are arranged in a square, and there are 120 people in the outermost layer. How many students are there in this school?
一个学校的学生排成一个方阵，最外层有120人，这个学校一共有多少学生．
<gadget id="calculator">120 + 4</gadget>
<output>124</output>

<gadget id="calculator">124 / 4</gadget>
<output>31</output>

<gadget id="calculator">31 * 31</gadget>
<output>961</output>

<result>961</result>