One side of an isosceles triangle is 9 cm long and the other side is 4 cm long. What is the perimeter of this triangle in cm?
一个等腰三角形的一条边长是9cm，另一条边长是4cm，这个三角形的周长是多少厘米？
<gadget id="calculator">9 + 9 + 4</gadget>
<output>22</output>

<result>22</result>