There are two small sticks of 6 cm. If another small stick is added to surround a triangle, the small stick must be smaller than how many centimeters.
有两根6厘米的小棒，如果再添一根小棒围城一个三角形，则这根小棒一定小于多少厘米．
<gadget id="calculator">6 + 6</gadget>
<output>12</output>

<result>12</result>