8 years = 5600
10 years = 3500x2= 7000
1 year = 7000/10 = 700
1 year = 700
8 years = 700x8 = 5600
One week equals one hundred and sixty eight hours.
There are twenty four hours in a day and seven days in a week.
So in one week there are seven times twenty four equals one hundred and sixty eight hours.