Sixteen boys and 14 girls attended Simon's birthday party. Three-fourths of the boys and 6/7 of the girls brought gifts. How many of those who attended did not bring gifts?
16 x 3/4 = 
<gadget id="calculator">16*3/4</gadget>
<output>12</output>
12 boys brought gifts.
So, 16 -12 = 
<gadget id="calculator">16-12</gadget>
<output>4</output>
4 boys did not bring gifts.
14 x 6/7 = 
<gadget id="calculator">14*6/7</gadget>
<output>12</output>
12 girls brought gifts.
So, 14 - 12 = 
<gadget id="calculator">14-12</gadget>
<output>2</output>
2 girls did not bring gifts.
Therefore, a total of 4 boys + 2 girls = 
<gadget id="calculator">4+2</gadget>
<output>6</output>
6 people did not bring gifts.

<result>6</result>