A square with a side length of 12 cm is cut into 3 rectangles of the same size. What is the perimeter of each small rectangle in cm?
一个边长12厘米的正方形，把它剪成3个同样大小的长方形，其中每个小长方形的周长是多少厘米．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">12 + 4</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>