The ratio of the circumferences of two circles is 3:2, and the difference in area is 40 square centimeters, what is the sum of the areas of the two circles?
两个圆的周长之比是3：2，面积之差是40平方厘米，两个圆的面积之和是多少．
<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">9 + 4</gadget>
<output>13</output>

<gadget id="calculator">8 * 13</gadget>
<output>104</output>

<result>104</result>