There is a piece of rectangular glass with a width of 8 cm and a length of 4 cm more than twice the width. If an aluminum strip is used to frame the glass (the thickness of the aluminum strip is not counted), how many centimeters of aluminum strip should be at least?
有一块长方形玻璃，宽8厘米，长比宽的2倍还多4厘米，如果在玻璃的周围用铝条框住(铝条厚度不算)，那么至少要多少厘米长的铝条？
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 8</gadget>
<output>28</output>

<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<result>56</result>