For a rectangular queue, if one horizontal row and one vertical row are added, 13 people will be added. What is the minimum number of people in this rectangular queue?
一个长方形队列，如果增加一横行和一竖行，就要增加13人，这个长方形的队列原来最少有多少人．
<gadget id="calculator">13 - 2</gadget>
<output>11</output>

<gadget id="calculator">11 + 13</gadget>
<output>24</output>

<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">16 - 8</gadget>
<output>8</output>

<gadget id="calculator">8 - 13</gadget>
<output>-5</output>

<gadget id="calculator">24 + 16 + (-5)</gadget>
<output>35</output>

<result>35</result>