The lengths of two sets of opposite sides of a parallelogram are 6 cm and 8 cm respectively, what is the perimeter of this parallelogram in cm?
一个平行四边形两组对边的长度分别是6厘米和8厘米，这个平行四边形的周长是多少厘米？
<gadget id="calculator">6 + 8</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<result>28</result>