Aunt Wang wants to make a glass counter with a length of 4.5m, a width of 0.6m, and a height of 75cm. Now she needs to install angle irons on all sides of the counter. How many meters of angle irons are needed at least?
王阿姨要做一个长4.5m，宽0.6m，高75cm的玻璃柜台，现在要在柜台的各边都安装上角铁，至少需要角铁多少米？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4.5 + 0.6 + (3/4)</gadget>
<output>5.85</output>

<gadget id="calculator">5.85 * 2</gadget>
<output>11.7</output>

<result>11.7</result>