Cut out the largest circle on a tin sheet with a length of 9.5dm and a width of 8dm. What is the area of the largest circle in square meters?
在一个长9.5dm，宽8dm的白铁皮上剪下一个最大的圆．这个最大圆的面积是多少平方分米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<result>50.24</result>