Given that the sides of an isosceles triangle are 9cm and 4cm respectively, what is the perimeter of the triangle in cm?
已知等腰三角形的两边长分别是9cm和4cm，此三角形的周长是多少cm．
<gadget id="calculator">9 + 9 + 4</gadget>
<output>22</output>

<result>22</result>