The circumference of the circular fountain is 78.5 meters, what is its radius in meters?
圆形喷水池的周长是78.5米，它的半径是多少米？
<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">78.5 / 6.28</gadget>
<output>12.5</output>

<result>12.5</result>