The perimeter of the triangle is 36cm, and the ratio of the lengths of the three sides is 2:3:4, what is the longest side of the triangle in cm?
三角形的周长是36cm，其中三条边的长度比分别是2：3：4，求这个三角形的最长的边是多少cm？
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">36 * (4/9)</gadget>
<output>16</output>

<result>16</result>