There are two rectangles of the same size, 8 decimeters long and 4 decimeters wide. If you put them together to form a square, what is its perimeter?
有2个一样大小的长方形，长8分米，宽4分米．如把它们拼成一个正方形，它的周长是多少．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>