group gymnastics performance is held on a certain festival. The students line up in a hollow square. There are 56 people in the outermost layer and 32 people in the innermost layer. How many people participate in the group gymnastics performance?
某节日举行团体操表演，同学们排成一个中空方阵，最外层人数有56人，最内层人数32人，参加团体操表演的有多少人？
<gadget id="calculator">32 + 8</gadget>
<output>40</output>

<gadget id="calculator">32 + 16</gadget>
<output>48</output>

<gadget id="calculator">32 + 40 + 48 + 56</gadget>
<output>176</output>

<result>176</result>