A piece of iron wire can just enclose a rectangle with a length of 10.5 cm and a width of 2.06 cm. The largest circle can be formed with the same length of iron wire. What is the area of this circle in square centimeters?
一段铁丝刚好能围成一个长10.5cm，宽2.06cm的长方形，用同样长的铁丝围成一个最大的圆，这个圆的面积是多少平方厘米．
<gadget id="calculator">10.5 + 2.06</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 / 3.14</gadget>
<output>8</output>

<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>