The sum of the radii of two circles is 12 cm, and the diameter of one circle is 10 cm, what is the area of the other circle?
两个圆半径的和12厘米，一个圆直径10厘米，另一个圆的面积多少？
<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>