A parallelogram nailed with four sticks. The bottom is 18 cm and the height is 11 cm. After drawing it into a rectangle, the area increases by 36 square centimeters. Find the perimeter of this parallelogram.
一个用四根木条钉成的平行四边形．底是18厘米，高是11厘米．把它拉成一个长方形后，面积增加了36平方厘米，求这个平行四边形的周长．
<gadget id="calculator">36 / 18</gadget>
<output>2</output>

<gadget id="calculator">2 + 11 + 18</gadget>
<output>31</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<result>62</result>