The sum of the radii of the two circles is 10 cm, the diameter of the larger circle is 12 cm, what is the area of the smaller circle?
两个圆的半径之和为10厘米，大圆的直径是12厘米，小圆的面积是多少？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>