Two sticks with lengths of 9 cm and 4 cm and one stick with a length of 1 cm can form an isosceles triangle.
两根长度分别为9厘米和4厘米的小棒与一根多少厘米的小棒能围成一个等腰三角形．
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<result>9</result>