It is known that the side length of a square is greater than 8 cm. With the four vertices of the square as the centers, draw sectors with a radius of 4 cm inside the square. What is the sum of the areas of these sectors in square centimeters?
已知正方形的边长大于8厘米，分别以正方形的四个顶点为圆心，在正方形内画半径为4厘米的扇形，这些扇形的面积和是多少平方厘米．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<result>50.24</result>