If the two adjacent sides of a parallelogram are 6 cm and 5 cm long, what is the perimeter of the parallelogram in cm?
一个平行四边形的两条邻边长6厘米和5厘米，那么这个平行四边形的周长是多少厘米．
<gadget id="calculator">6 + 5</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<result>22</result>