Two radii perpendicular to each other divide the circle into two parts, the smaller part is 10 square centimeters, and the larger part is how many square centimeters.
互相垂直的两条半径把圆分成两个部分，其中较小部分是10平方厘米，较大部分面积是多少平方厘米．
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<result>30</result>