There are two circles, the sum of their areas is 1810 square centimeters, and the circumference of the small circle is 90% of the circumference of the large circle, what is the area of the large circle in square centimeters?
有两个圆，它们的面积之和是1810平方厘米，小圆的周长是大圆周长的90%，那么大圆的面积是多少平方厘米．
<gadget id="calculator">1_810 / 1.81</gadget>
<output>1_000</output>

<result>1_000</result>