Dad bought back a rectangular iron sheet with a length of 4 meters and a width of 3 meters. He wants to cut the largest square iron sheet from this sheet. What is the perimeter of this square iron sheet in meters?
爸爸买回了一张长4米，宽3米的长方形铁皮，要在这张铁皮上截取一块最大的正方形铁片，这个正方形铁片的周长是多少米？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>