An isosceles triangle, the ratio of the lengths of the two sides is 3:2, and one side is 12cm long, what is the maximum perimeter of the isosceles triangle in cm?
一个等腰三角形，其中两条边的长度比是3：2，且有一条边长12cm，这个等腰三角形的周长最多是多少cm．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 + 18 + 12</gadget>
<output>48</output>

<result>48</result>