The sum of two adjacent sides of a parallelogram is 17 cm. What is the perimeter of the parallelogram in cm?
一个平行四边形相邻两边的和是17厘米，这个平行四边形的周长是多少厘米？
<gadget id="calculator">17 * 2</gadget>
<output>34</output>

<result>34</result>