The school held a flag-raising ceremony and required students to form a hollow square queue around the flag-raising platform. Now we know that there are 52 students in the outermost layer and 28 students in the innermost layer. Please calculate how many students are needed for this hollow square queue student.
学校举行升旗仪式，要求学生围绕升旗台排列成一个空心的正方形队列，现知道最外层有52个学生，最内层有28个学生，请你计算一下，这个空心的正方形队列共需要多少个学生．
<gadget id="calculator">52 - 28</gadget>
<output>24</output>

<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">28 * 4</gadget>
<output>112</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">112 + 8 + 16 + 24</gadget>
<output>160</output>

<result>160</result>