Patrick has three glue sticks that are partially used. One has 1/6 left, the second has 2/3 left and the third one has 1/2 left. If a glue stick is 12 millimeters long originally, what is the total length of the glue sticks that are not used?
The first glue stick has 12 x 1/6 = 
<gadget id="calculator">12*1/6</gadget>
<output>2</output>
2 millimeters left.
The second glue stick has 12 x 2/3 = 
<gadget id="calculator">12*2/3</gadget>
<output>8</output>
8 millimeters left.
The third glue stick has 12 x 1/2 = 
<gadget id="calculator">12*1/2</gadget>
<output>6</output>
6 millimeters left.
There are a total of 2 + 8 + 6 = 
<gadget id="calculator">2+8+6</gadget>
<output>16</output>
16 millimeters of glue sticks that are not used.

<result>16</result>