There are 24 marbles in a jar. Half are blue. There are 6 red marbles. The rest of the marbles are orange. How many orange marbles are there?
There are 24/2 = 
<gadget id="calculator">24/2</gadget>
<output>12</output>
12 blue marbles.
Blue and red marbles make up 12 + 6 = 
<gadget id="calculator">12+6</gadget>
<output>18</output>
18 of the 24 marbles.
Thus, there are 24-18=
<gadget id="calculator">24-18</gadget>
<output>6</output>
6 orange marbles.

<result>6</result>