The karaoke hall has a circular performance stage with a circumference of 50.24 meters. Now the radius is widened by 1 meter, how many square meters is increased from the original area?
歌厅有一个圆形表演台，周长50.24米．现在半径加宽1米，比原来的面积增加多少平方米？
<gadget id="calculator">50.24 / 3.14 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 ** 2</gadget>
<output>81</output>

<gadget id="calculator">3.14 * 81</gadget>
<output>254.34</output>

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

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

<gadget id="calculator">254.34 - 200.96</gadget>
<output>53.38</output>

<result>53.38</result>