Make a rectangular frame with wooden strips, the length is 15cm, and the width is 8cm. After drawing it into a parallelogram, what is the perimeter of the parallelogram in cm?
用木条作成一个长方形框，长15cm，宽8cm，把它拉成一个平行四边形后，平行四边形的周长是多少cm．
<gadget id="calculator">15 + 8</gadget>
<output>23</output>

<gadget id="calculator">23 * 2</gadget>
<output>46</output>

<result>46</result>