A square of paper with a side length of 12 cm is cut into two perfectly equal rectangles, what is the perimeter of each rectangle in cm?
一个边长12厘米的正方形纸剪成两个完全相等的长方形，每个长方形的周长是多少厘米．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>