You want to go to trip around the world, and need to calculate how many days you are going to be absent from work. You start your trip in North America:
From North America to Europe, you need 96 hours;
From Europe to Asia you need 2 times less then from North America to Europe;
From Asia to Australia you need 23 less hours then from North America to Europe;
From Australia to South America you need 144 hours;
From South America to North America you need 24 hours.
So,how many days you are going to be absent from your house?