Brian has twice as many tennis balls as Frodo, who has 8 more than Lily. If Lily has 3 tennis balls, how many does Brian have?
Frodo has 8 tennis balls more than Lily (who has 3), so he has 8+3 = 
<gadget id="calculator">8+3</gadget>
<output>11</output>
11 tennis balls.
Brian has twice as many as Frodo, which makes 11*2 = 
<gadget id="calculator">11*2</gadget>
<output>22</output>
22 tennis balls.

<result>22</result>