A piece of iron wire is 20 meters long, and there are 7.44 meters left after making two identical rings with it. What is the area of each circle in square meters?
一根铁丝长20米，用它做成2个同样的圆环后还剩下7.44米．每个圆环的面积是多少平方米？
<gadget id="calculator">20 - 7.44</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 2</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<result>3.14</result>