The children lined up in a square team to do exercises, whether counting from the front or the back, or counting from the left or the right, Hong Hong ranked fourth. How many children are there in this square team?
小朋友排成方队做操，不管从前面数还是从后面数，也不管从左面数还是从右面数，红红都排在第4．求这个方队一共有多少个小朋友？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

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

<result>49</result>