Evenly surround 12 chess pieces into a square, the correct statement below is how many pieces are on each side
把12枚棋子均匀围成一个正方形，下面说法正确的是每边多少枚
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

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

<result>4</result>