The side length of a square is 10 cm, and there is a disc with a radius of 2 cm inside. The disc moves against the inner wall of the square, how many square centimeters does it sweep?
一个正方形的边长为10厘米，内有一个半径为2厘米的圆片，圆片紧贴着正方形内壁运动，则它扫过的面积是多少平方厘米？
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

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

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

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">16 - 12.56</gadget>
<output>3.44</output>

<gadget id="calculator">100 - 4 - 3.44</gadget>
<output>92.56</output>

<result>92.56</result>