From 2 small sticks of 4 cm long and 2 small sticks of 8 cm long, choose 3 sticks to form an isosceles triangle. What is the perimeter of the formed isosceles triangle in cm?
从2根4厘米长和2根8厘米长的小棒中，选出3根围成一个等腰三角形，围成的等腰三角形的周长是多少厘米．
<gadget id="calculator">4 + 4 + 4 + 4 + 4</gadget>
<output>20</output>

<result>20</result>