A 20-meter circular flower bed, with a pot of roses placed every 2 meters, how many pots of roses are needed for this flower bed.
一个20米的圆形花坛，每隔2米摆放一盆月季花，那么这个花坛共需要多少盆月季花．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>