To install angle irons on each side of a glass counter with a length of 3.2 meters, a width of 4.4 meters, and a height of 0.8 meters, how many meters of angle irons do you need to prepare at least?
要给长3.2米，宽4.4米，高0.8米的玻璃柜台各边都安上角铁，至少需要准备多少米角铁？
<gadget id="calculator">3.2 + 4.4 + 0.8</gadget>
<output>8.4</output>

<gadget id="calculator">8.4 * 4</gadget>
<output>33.6</output>

<result>33.6</result>