A triangle is formed with 24 cm long iron wire. Among all the triangles formed, the length of the longest side is at most how many centimeters. (rounded centimeters)
用24厘米长的铁丝围成一个三角形，在围成的所有三角形中，最长的一条边最多长多少厘米．(取整厘米数)
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<result>11</result>