Trey has 7 times as many turtles as Kris. Kris has 1/4 as many turtles as Kristen has. How many more turtles does Trey have than Kristen, if Kristen has 12?
Kris has 12/4 = 
<gadget id="calculator">12/4</gadget>
<output>3</output>
3 turtles.
Trey has 3*7 = 
<gadget id="calculator">3*7</gadget>
<output>21</output>
21 turtles.
Trey has 21-12 = 
<gadget id="calculator">21-12</gadget>
<output>9</output>
9 more turtles than Kristen.

<result>9</result>