The difference between the areas of the two circles is 209 square meters. It is known that the circumference of the larger circle is 1 (1/9) times the circumference of the smaller circle. What is the sum of the areas of the two circles?
两个圆的面积之差是209平方米，已知大圆的周长是小圆周长的1(1/9)倍，则两圆的面积和是多少．
<gadget id="calculator">100 / 81</gadget>
<output>100/81 = around 1.234568</output>

<gadget id="calculator">(100/81) * 891</gadget>
<output>1_100</output>

<gadget id="calculator">1_100 + 891</gadget>
<output>1_991</output>

<result>1_991</result>