There is a largest square inside the circle. The area of the square is 10 square centimeters. What is the area of the circle?
圆内有一个最大的正方形，正方形的面积是10平方厘米，圆的面积是多少？
<gadget id="calculator">3.14 * 5</gadget>
<output>15.7</output>

<result>15.7</result>