Arrange three squares with side lengths of 5cm, 4cm and 2cm in a row in order from largest to smallest, what is the perimeter of the plane figure in cm?
把边长分别为5cm、4cm和2cm的三个正方形按从大到小的顺序排成一行，拼成的平面图形的周长是多少cm．
<gadget id="calculator">5 + 4 + 2 + 5</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>