There are 10 people standing on each side of the gymnastics performance square in the sports meeting. How many people are there in the outermost layer?
运动会体操表演方阵，最外层每边站了10个人，它的最外层一共有多少个人．
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">40 - 4</gadget>
<output>36</output>

<result>36</result>