A circular fish pond, walking along the fish pond for 2 laps is about 314 meters, what is the diameter of this fish pond in meters?
一个圆形鱼池，沿着鱼池走2圈大约要走是314米，这个鱼池的直径是多少米？
<gadget id="calculator">314 / 2</gadget>
<output>157</output>

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

<result>50</result>