The area of a small circle is 12 square centimeters. The ratio of the radius of the large circle to the radius of the small circle is 3:2. What is the area of the large circle in square centimeters?
一个小圆的面积是12平方厘米，大圆半径与小圆半径的比是3：2，大圆的面积是多少平方厘米．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 9</gadget>
<output>27</output>

<result>27</result>