A 60 cm long iron wire is folded into an isosceles triangle with a base of 26 cm, find the waist length of this triangle.
用一根长60厘米的铁丝折成一个底是26厘米的等腰三角形，求这个三角形腰长．
<gadget id="calculator">60 - 26</gadget>
<output>34</output>

<gadget id="calculator">34 / 2</gadget>
<output>17</output>

<result>17</result>