The side length of a square is equal to the radius of a circle. The area of the circle is 78.5 square centimeters. What is the area of the square?
一个正方形的边长与一个圆的半径相等，圆的面积是78.5平方厘米，正方形的面积是多少？
<gadget id="calculator">78.5 / 3.14</gadget>
<output>25</output>

<result>25</result>