The students line up in a square team to perform. There are 3 people in the front, back, left and right of Tongtong. How many people are performing?
同学们排成方队表演节目，彤彤的前、后、左、右各有3人，表演节目的共有多少人？
<gadget id="calculator">3 + 3 + 1</gadget>
<output>7</output>

<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<result>49</result>