Students line up in a square team to do exercises. Xiaofang is ranked 16th from left or right, and 16th from front or back. How many people do exercises in total?
同学们排成一个方队做操，小芳从左起或从右起都排在第16个，从前起或从后起也都排在第16个，做操的一共有多少个．
<gadget id="calculator">16 - 1</gadget>
<output>15</output>

<gadget id="calculator">16 + 15</gadget>
<output>31</output>

<gadget id="calculator">31 * 31</gadget>
<output>961</output>

<result>961</result>