The students lined up to do exercises, regardless of counting from the front, from the back, from the left, or from the right, Xiaoqing was ranked fourth, how many people did the exercises in total.
同学们排成方队做操，无论从前数，从后数，还是从左数，从右数，小青都排第4个，一共有多少人做操．
<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>