In the gymnastics competition, Qiqi's position is the 6th from the front, the 12th from the back, the 15th from the left, and the 11th from the right. If there are the same number of people in each row and the same number in each column, how many people are there in the gymnastics competition?
在体操比赛中，齐齐所站的位置从前数是第6个，从后数是第12个，从左数是第15个，从右数是第11个．如果每行的人数相同，每列人数也相同，那么参加体操比赛的一共有多少人？
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">6 + 11</gadget>
<output>17</output>

<gadget id="calculator">11 - 1</gadget>
<output>10</output>

<gadget id="calculator">15 + 10</gadget>
<output>25</output>

<gadget id="calculator">17 * 25</gadget>
<output>425</output>

<result>425</result>