The radius of a circular flower bed is 5 meters, and a pot of flowers is placed every 3.14 meters in the flower bed, how many pots are needed in total.
一个圆形花坛的半径是5米，花坛每隔3.14米放一盆花，一共需要放多少盆．
<gadget id="calculator">5 / 3.14</gadget>
<output>1.592357</output>

<gadget id="calculator">2 * 3.14 * 1.592357</gadget>
<output>10.000002</output>

<result>10.000002</result>