Place a flower pot every 3 meters around a square flower bed, place four vertices, and place 8 pots on each side. What is the perimeter of the flower bed in meters?
在一个正方形的花坛四周每隔3米放一个花盆，四个顶点都要放，每边放了8盆，这个花坛的周长是多少米？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 * 3 * 4</gadget>
<output>84</output>

<result>84</result>