Assume you get a job upon graduation (who knew?). Your salary is $30,000 per year – if you gave all of your salary to the government every year, - how many years would it take to pay off your debt share of the 90 trillion?
First, get your "facts" sraight!!. US national debt isn't $90 trillion but $19+trillion, a very big difference!!.
Divide 1.9 x 10^13 by US populattion(320 million?), and you get: $59,375 - your share of the debt.
$59,375 / $30,000 =1.98 - or just under 2 years.