If a square with a side length of 10 cm is cut off the largest circle, what is the area of the remaining part in square centimeters?
边长10厘米的正方形，剪去一个最大的圆，剩余部分的面积是多少平方厘米．
<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>