Master Zhang wants to cut the largest circle out of a square iron sheet with a side length of 16 decimeters. What is the area of this circle in square decimeters?
张师傅要在一个边长为16分米的正方形铁片上剪下一个最大的圆，这个圆的面积是多少平方分米？
<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>