The radius of a circle is 10 cm, when the radius of the circle increases by 10%, how much does the area increase?
一个圆的半径是10厘米，当圆的半径增加10%，面积增加多少
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">10 * (11/10)</gadget>
<output>11</output>

<gadget id="calculator">11 ** 2</gadget>
<output>121</output>

<gadget id="calculator">3.14 * 121</gadget>
<output>379.94</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">379.94 - 314</gadget>
<output>65.94</output>

<gadget id="calculator">65.94 / 314</gadget>
<output>0.21</output>

<result>0.21</result>