There are 2 small sticks of 2 cm, 7 cm and 14 cm each. Choose 3 of them to form a triangle. What is the shortest circumference in cm?
有2厘米、7厘米、14厘米的小棒各2根，选其中的3根围成一个三角形，周长最短是多少厘米．
<gadget id="calculator">2 + 7 + 7</gadget>
<output>16</output>

<result>16</result>