How many meters of aluminum alloy is needed to edge a glass with a length of 5 meters and a width of 3 meters with aluminum alloy?
要给一个长5米，宽3米的玻璃用铝合金压边，共需铝合金多少米？
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

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

<result>16</result>