If two rectangles with a length of 8 cm and a width of 4 cm are put together to form a square, what is the perimeter of the square in cm?
把两个长是8厘米，宽是4厘米的长方形拼成一个正方形，这个正方形的周长是多少厘米？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>