The karaoke hall has a circular performance stage with a circumference of 43.96 meters. Now that the radius is widened by 1 meter, how much is it increased from the original area?
歌厅有一个圆形表演台，周长43.96米．现在半径加宽1米，比原来的面积增加多少？
<gadget id="calculator">43.96 / 3.14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

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

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 49</gadget>
<output>153.86</output>

<gadget id="calculator">200.96 - 153.86</gadget>
<output>47.1</output>

<result>47.1</result>