Xiao Ming made a parallelogram frame with iron wire, and a group of adjacent sides are 5 cm and 3 cm respectively. How many centimeters of wire is needed to make this frame.
小明用铁丝做了一个平行四边形的框架，一组邻边分别是5厘米和3厘米．做这个框架需要用多少厘米的铁丝．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>