A 40 cm long iron wire forms an isosceles triangle whose base is 8 cm long. What is the length of one side of this isosceles triangle?
把一根40厘米长的铁丝围成一个底边长为8厘米的等腰三角形，这个等腰三角形的一条腰长是多少厘米？
<gadget id="calculator">40 - 8</gadget>
<output>32</output>

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<result>16</result>