Cut a rectangular piece of paper from the middle, just cut into two squares with side lengths of 12 cm. What is the perimeter of this rectangle?
将一个长方形纸片从中间剪开，正好剪成两个边长为12厘米的正方形．求这个长方形的周长是多少？
<gadget id="calculator">12 + 12 + 12</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>