The perimeter of an isosceles triangle is 86 cm and the base is 38 cm. What is its waist in cm?
一个等腰三角形的周长是86厘米，底是38厘米，它的腰是多少厘米？
<gadget id="calculator">86 - 38</gadget>
<output>48</output>

<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<result>24</result>