The students lined up in a square team to do exercises, no matter counting from the front to the back, counting from the left, or counting from the right, Xiaoping was the fourth. How many people did the exercises?
同学们排成方形队做操，无论从前数从后数，还是从左数，从右数，小平都是第4个，共有多少人做操？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

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

<result>49</result>