The diameter ratio of the large and small circles is 3:2, and the circumference of the small circle is 4.71 cm longer than (1/2) the circumference of the large circle. Find the area of the large circle.
大小圆直径比为3：2，小圆周长比大圆周长的(1/2)还多4.71厘米，求大圆面积．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">4.71 / (1/6)</gadget>
<output>28.26</output>

<gadget id="calculator">28.26 / 3.14 / 2</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">3.14 * 20.25</gadget>
<output>63.585</output>

<result>63.585</result>