If the sum of adjacent sides of a parallelogram is 16 cm, what is the perimeter of the parallelogram in cm?
一个平行四边形的一组邻边的和是16厘米，这个平行四边形的周长是多少厘米．
<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>