The area of the square is 10 square meters, what is the area of the largest circle inside the square?
正方形的面积是10平方米，正方形内最大圆的面积是多少平方米？
<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) * 3.14</gadget>
<output>7.85</output>

<result>7.85</result>