Plant willow trees around a circular pool with a diameter of 50 meters, and plant a willow tree every 6.28 meters. How many willow trees can be planted in total?
在一个直径为50米的圆形水池周围栽种柳树，每隔6.28米栽一棵柳树，一共可以栽多少棵柳树？
<gadget id="calculator">50 / 6.28</gadget>
<output>7.961783</output>

<gadget id="calculator">3.14 * 7.961783</gadget>
<output>24.999999</output>

<result>24.999999</result>