The students of our school participated in the gymnastics performance and formed a square formation. If you want to reduce this square matrix by one row and one column, you need to reduce 45 people. Ask how many students participated in the gymnastics performance.
我校学生参加体操表演，排成了一个正方形方阵．如果要使这个正方形方阵减少一行和一列，则要减少45人，问参加体操表演的学生原来有多少人．
<gadget id="calculator">45 + 1</gadget>
<output>46</output>

<gadget id="calculator">46 / 2</gadget>
<output>23</output>

<gadget id="calculator">23 * 23</gadget>
<output>529</output>

<result>529</result>