If a rectangular frame is 18 cm long and 15 cm wide, what is the perimeter in cm when drawn into a parallelogram?
一个长方形框架长18厘米，宽15厘米，拉成平行四边形周长是多少厘米．
<gadget id="calculator">18 + 15</gadget>
<output>33</output>

<gadget id="calculator">33 * 2</gadget>
<output>66</output>

<result>66</result>