49 students from Class 1, Grade 4 lined up in a square team. How many people are there in the outermost circle of this square?
四年级1班49人排成一个方队．这个方队最外围一共有多少人？
<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<gadget id="calculator">28 - 4</gadget>
<output>24</output>

<result>24</result>