Katya sold 8 glasses of lemonade and Ricky sold 9 glasses of lemonade. If Tina sold twice as many as Katya and Ricky's combined sales, how many more glasses of lemonade than Katya did Tina sell?
Katya and Ricky sold 8 + 9 = 
<gadget id="calculator">8+9</gadget>
<output>17</output>
17 glasses of lemonade.
Tina sold 17 x 2 = 
<gadget id="calculator">17*2</gadget>
<output>34</output>
34 glasses of lemonade.
Tina sold 34 - 8 = 
<gadget id="calculator">34-8</gadget>
<output>26</output>
26 more glasses of lemonade than Katya.

<result>26</result>