Pythagoras said: "Of all plane figures, the most beautiful is the circle". Stones are thrown into the lotus pond to form ripples, and the circles of water patterns are beautiful. If one circle of water patterns is larger than the radius of the other circle (1/10), the area will be larger ((())/(()) ).
毕达哥拉斯说："一切平面图形中，最美的是圆形"．石子投入荷塘，形成涟漪，一圈圈水纹美轮美奂"．如果其中一圈水纹比另一圈半径大(1/10)，面积将会大((())/(()))．
<gadget id="calculator">1 / 10</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">(11/10) ** 2</gadget>
<output>121/100 = around 1.21</output>

<gadget id="calculator">3.14 * (121/100)</gadget>
<output>3.7994</output>

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

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

<gadget id="calculator">3.7994 - 3.14</gadget>
<output>0.6594</output>

<gadget id="calculator">0.6594 / 3.14</gadget>
<output>0.21</output>

<gadget id="calculator">0.21 * 1</gadget>
<output>0.21</output>

<result>0.21</result>