Walking around a circular fish pond is exactly 94.2 meters. What is the diameter of this fish pond?
绕一个圆形的养鱼池走一圈正好是94.2米，这个养鱼池的直径是多少米？
<gadget id="calculator">94.2 / 3.14</gadget>
<output>30</output>

<result>30</result>