Unrest leads to 30 days of protest in 21 different cities.  In each city, there are 10 arrests per day.  The average person spends 4 days in jail before trial and then spends half of a 2-week sentence.  How many combined weeks of jail time are there?
Each city arrest 30*10=<T>multiply(30, 10)=300 people during the protest
So a total of 300*21=<T>multiply(300, 21)=6300 people were arrested
They spend 14/2=<T>divide(14, 2)=7.0 days of their sentence in jail
So they spend a total of 7+4=<T>add(7, 4)=11 days in jail
So there was a total of 6300*11=<T>multiply(6300, 11)=69300 days in jail
So they spent 69300/7=<T>divide(69300, 7)=9900.0 weeks in jail
