In order to connect with the "Cultural Festival", the school organizes a square team with 20 people standing on each side of the outermost side. How many students are there in the outermost layer?
为了通接"文化节"，学校组织一个正方形的队伍，最外边每边站20人．最外层一共有多少名学生．
<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<gadget id="calculator">80 - 4</gadget>
<output>76</output>

<result>76</result>