Given that the side lengths of an isosceles triangle are 6cm and 3cm respectively, what is the perimeter of the isosceles triangle in cm
已知等腰三角形的边长分别是6cm、3cm，则该等腰三角形的周长是多少cm
<gadget id="calculator">3 + 3 + 3 + 3 + 3</gadget>
<output>15</output>

<result>15</result>