Add lace to a square tablecloth with a side length of 80 cm. What is the minimum length of the lace?
给一块边长80厘米的正方形桌布四周加上花边，花边最少长多少分米？
<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>