If a ring has an outer diameter of 8 decimeters and an inner diameter of 6 decimeters, if it is enlarged at a ratio of 2:1, how many square meters will the area of the enlarged ring increase compared to the area of the original ring?
一个圆环，它的外直径是8分米，内直径是6分米，按2：1的比例放大，则放大后圆环的面积比原来圆环的面积增加了多少平方米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">8 * 1</gadget>
<output>8</output>

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

<gadget id="calculator">6 * 1</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">64 - 36</gadget>
<output>28</output>

<gadget id="calculator">3.14 * 28</gadget>
<output>87.92</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 7</gadget>
<output>21.98</output>

<gadget id="calculator">87.92 - 21.98</gadget>
<output>65.94</output>

<result>65.94</result>