A piece of iron sheet with a side length of 80 centimeters, what is the perimeter of the iron sheet in centimeters after cutting off a small square with a side length of 5 centimeters from each of its four corners?
一块正方形的铁皮，边长是80厘米，在它的四个角各剪去边长为5厘米的小正方形后，这块铁皮的周长是多少厘米？
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<result>320</result>