There are 365 days in one year
Therefore, Days in 100 years = 365 * 100
                                               = 36500 days.
In 100 years there will be 25 leap years meaning that there are 25 extra days.
So, the total number of days in 100 years = 36500 + 25
                                                                   = 36525 days
Total number of days in 100 years is 36525 days