Shazhen Wushui Park plans to build a circular flower pond with a diameter of 50 meters. Plant a tree every 1 meter around the flower pond. How many trees can be planted?
沙镇武水公园预备建一个圆形花池，直径是50米，在这个花池的周围每隔1米栽一棵树，可以栽多少棵？
<gadget id="calculator">50 / 1</gadget>
<output>50</output>

<gadget id="calculator">3.14 * 50</gadget>
<output>157</output>

<result>157</result>