Cut out the largest circle from a square piece of paper with a side length of 16 cm. What is the area of this circle in square centimeters?
从一个边长16厘米的正方形纸片中、剪下一个最大的圆，这个圆的面积是多少平方厘米？
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<result>200.96</result>