The radius of a small circle is 12 cm. The ratio of the radius of the large circle to the radius of the small circle is 3:2. Find the circumference of the large circle.
一个小圆的半径是12厘米，大圆半径与小圆半径之比是3：2，求大圆的周长．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">12 * (3/2)</gadget>
<output>18</output>

<gadget id="calculator">3.14 * 18 * 2</gadget>
<output>113.04</output>

<result>113.04</result>