When two squares of the same size are put together to form a rectangle, the perimeter is 6 cm less than the sum of the perimeters of the original two squares. What is the perimeter of a square in centimeters?
两个大小相同的正方形拼成一个长方形后，周长比原来两个正方形周长的和减少了6厘米．原来一个正方形的周长是多少厘米？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>