The school band is going to a competition. Five members play the flute. There are three times as many members who play the trumpet. There are eight fewer trombone players than trumpeters, and eleven more drummers than trombone players. There are twice as many members that play the clarinet as members that play the flute. Three more members play the French horn than play the trombone. How many seats are needed on the bus?
There are 3 trumpets/flute x 5 flutes = 
<gadget id="calculator">3*5</gadget>
<output>15</output>
15 trumpet players.
There are 15 players - 8 players = 
<gadget id="calculator">15-8</gadget>
<output>7</output>
7 trombone players.
There are 7 players + 11 players = 
<gadget id="calculator">7+11</gadget>
<output>18</output>
18 drummers.
There are 2 clarinets/flute x 5 flutes = 10 clarinet players.
There are 7 players + 3 players = 
<gadget id="calculator">7+3</gadget>
<output>10</output>
10 French horn players.
In total 5 players + 15 players + 7 players + 18 players + 10 players + 10 players = 
<gadget id="calculator">5+15+7+18+10+10</gadget>
<output>65</output>
65 seats needed.

<result>65</result>