The sum of the radii of the two circles is 12cm, and the diameter of the smaller circle is 10cm. What is the area of the larger circle?
两圆的半径之和为12cm，小圆直径为10cm，大圆的面积是多少？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 49</gadget>
<output>153.86</output>

<result>153.86</result>