If two squares with a perimeter of 8cm are put together to form a rectangle, what is the perimeter of the rectangle in centimeters?
两个周长是8cm的正方形，拼成一个长方形，这个长方形的周长是多少厘米
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

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

<result>12</result>