The lengths of two adjacent sides of a parallelogram are 10 cm and 8 cm respectively, what is the perimeter of the parallelogram in cm?
一个平行四边形相邻两边的长分别是10厘米和8厘米，这个平行四边形的周长是多少厘米？
<gadget id="calculator">10 + 8</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>