A 30 cm long iron wire forms an isosceles triangle whose base is 8 cm. What is the length of one side of this isosceles triangle?
把30厘米长的铁丝围成一个底边是8厘米的等腰三角形，这个等腰三角形的一条腰长多少厘米？
<gadget id="calculator">30 - 8</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<result>11</result>