On the edge of a circular pool with a diameter of 3m, place a potted flower every 6.28dm, how many potted flowers can be placed in total.
在直径是3m的圆形水池边上，每隔6.28dm摆放一盆花，一共能摆放多少盆花．
<gadget id="calculator">6.28 / 10</gadget>
<output>0.628</output>

<gadget id="calculator">3 / 0.628</gadget>
<output>4.77707</output>

<gadget id="calculator">3.14 * 4.77707</gadget>
<output>15</output>

<result>15</result>