There are 100 people in a theater. If 19 of these people have blue eyes, half of them have brown eyes, a quarter have black eyes, and the rest have green eyes, how many of them have green eyes?
100/2 = 
<gadget id="calculator">100/2</gadget>
<output>50</output>
50 people in the theater have brown eyes.
100/4 = 
<gadget id="calculator">100/4</gadget>
<output>25</output>
25 people in the theater have black eyes.
There are 50+25+19 = 
<gadget id="calculator">50+25+19</gadget>
<output>94</output>
94 people in the theater with either brown, black, or blue eyes.
There are 100-94 = 
<gadget id="calculator">100-94</gadget>
<output>6</output>
6 people in the theater with green eyes.

<result>6</result>