A square tablecloth has a side length of 8 cm. If there is lace around the tablecloth, how much lace is needed?
一块正方形的桌布，边长是8厘米，如果在桌布的四周围一圈花边，需要多少花边？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>