The lengths of the three sides of a triangle are 20cm, 10cm, and 14cm. Putting two such triangles together to form a parallelogram, what is the maximum perimeter of the assembled parallelogram in centimeters?
一个三角形的三边长分别是20cm，10cm，14cm．把两个这样的三角形拼成一个平行四边形，拼成后的平行四边形周长最多是多少厘米？
<gadget id="calculator">20 + 14</gadget>
<output>34</output>

<gadget id="calculator">34 * 2</gadget>
<output>68</output>

<result>68</result>