The side length of a square is 10 cm, and the largest circle is cut out, what is the area of the remaining part?
正方形边长10厘米，剪下一个最大的圆，剩下部分的面积多少．
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">100 - 78.5</gadget>
<output>21.5</output>

<result>21.5</result>