Three rectangles of the same size fit together to form a square. The perimeter of the square is 48 cm. Find the perimeter of each rectangle.
三个同样大小的长方形正好拼成一个正方形，正方形的周长是48厘米，求每个长方形的周长．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<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>