With this information, you can calculate the quantity of days 645 hours is equal to.
¿What is the inverse calculation between 1 day and 645 hours?
Performing the inverse calculation of the relationship between units, we obtain that 1 day is 0.037209302 times 645 hours.
Which is the same to say that 645 hours is 26.875 days.
Six hundred forty-five hours equals to twenty-six days. *Approximation
A day is zero times six hundred forty-five hours. *Approximation
