The ratio of the areas of two large and small circles is 9:1, and the difference in circumference is 12.56 cm. What is the sum of the areas of the two large and small circles?
大小两个圆的面积之比是9：1，周长相差12.56厘米，大小两个圆的面积之和是多少．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">12.56 / 2 / 3.14 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">9 + 1</gadget>
<output>10</output>

<gadget id="calculator">3.14 * 1 * 10</gadget>
<output>31.4</output>

<result>31.4</result>