Nine adults went to a play with seven children. Adult tickets are $11 each and children's tickets are $7 each. How many dollars more did the adults' tickets cost in total than the children's tickets in total?
Adults = 9 * 11 = 
<gadget id="calculator">9*11</gadget>
<output>99</output>
99.
Children = 7 * 7 = 
<gadget id="calculator">7*7</gadget>
<output>49</output>
49.
Difference: 99 - 49 = $
<gadget id="calculator">99-49</gadget>
<output>50</output>
50.
The adults' tickets cost $50 more than the children's tickets.

<result>50</result>