The number of people in the outermost layer of the school gymnastics square is 72. How many people are there in this square?
学校体操方阵最外一层的人数是72人，这个方阵一共有多少人．
<gadget id="calculator">72 + 4</gadget>
<output>76</output>

<gadget id="calculator">76 / 4</gadget>
<output>19</output>

<gadget id="calculator">19 * 19</gadget>
<output>361</output>

<result>361</result>