In a square with a side length of 8 cm, draw the largest circle. What is the area of this circle in the area of the square?
在边长是8cm的正方形中，画一个最大的圆，这个圆的面积占正方形面积的多少π
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">16 / 64</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>