Master Zhang needs to press angle irons on the sides of a cuboid glass counter with a length of 2.5m, a width of 60dm, and a height of 80dm. How many angle irons does Master Zhang need at least?
张师傅要在一个长2.5m，宽60dm，高80dm的长方体玻璃柜台边都按上角铁，张师傅至少需要用多少角铁？
<gadget id="calculator">2.5 * 10</gadget>
<output>25</output>

<gadget id="calculator">25 + 60 + 80</gadget>
<output>165</output>

<gadget id="calculator">165 * 4</gadget>
<output>660</output>

<result>660</result>