The sum of the areas of the two circles is 31.4 square centimeters. It is known that the circumference of the small circle is 12.56 centimeters. What is the area of the larger circle in square centimeters?
两个圆面积的和是31.4平方厘米，已知小圆周长是12.56厘米，求大圆的面积是多少平方厘米？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">31.4 - 12.56</gadget>
<output>18.84</output>

<result>18.84</result>