There are a number of students, and there are 2 more students in the middle and solid squares. If there are 5 more students in the vertical and horizontal directions of the square, how many students are there?
有若干名学生，排成中实的方阵多2人，若在该方阵纵横两个方向各增加一行还缺5人，问有学生多少人？
<gadget id="calculator">2 + 5</gadget>
<output>7</output>

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

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">9 + 2</gadget>
<output>11</output>

<result>11</result>