An isosceles triangle is formed by an iron wire with a length of 24 cm, the base of which is 6 cm, what is the length of the waist of this isosceles triangle in cm?
用一根长24厘米的铁丝围成一个等腰三角形，其中底边是6厘米，这个等腰三角形的腰长是多少厘米？
<gadget id="calculator">24 - 6</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>