The area of the large circle is 6dm**2 larger than the area of the small circle. If the radii of the two circles are enlarged to 3 times the original, the area of the large circle is larger than the area of the small circle by how much dm**2.
大圆面积比小圆面积大6dm**2，若把两个圆的半径都扩大到原来的3倍，则大圆的面积比小圆的面积大多少dm**2．
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>