Cut a square with a side length of 8 decimeters into the largest circle, what is the area of the remaining part after removing the area of the circle?
把一个边长是8分米的正方形剪成一个最大的圆，除去圆的面积剩余部分的面积是多少平方分米．
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">64 - 50.24</gadget>
<output>13.76</output>

<result>13.76</result>