John ends up serving on jury duty.  Jury selection takes 2 days.  The trial itself lasts 4 times as long as jury selection  It is a complicated trial.  The number of hours spent in jury deliberation was the equivalent of 6 full days.  They spend 16 hours a day in deliberation.  How many days does John spend on jury duty?
Deliberation ended up taking 6 * 24 = <<6*24=144>>144 hours
That means they spent 144 / 16 = <<144/16=9>>9 days in deliberation
The trial lasted 2 * 4 = <<2*4=8>>8 days
So he spent 2 + 8 + 9 = <<2+8+9=19>>19 days on jury duty
#### 19