After cutting the largest square out of a rectangle whose length is 6 decimeters and width is 4 decimeters, what is the perimeter of the remaining figure?
在一个长是6分米，宽是4分米的长方形中剪一个最大的正方形后，剩下图形的周长是多少分米？
<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">2 + 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>