Around a square venue with a side length of 8 meters, place a pot of green plants every 2 meters, at least how many pots of green plants should be prepared.
在一个边长为8米的正方形会场四周，每隔2米摆放一盆绿色植物，至少要准备多少盆绿色植物．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>