With this information, you can calculate the quantity of hours 900 days is equal to.
¿What is the inverse calculation between 1 hour and 900 days?
Performing the inverse calculation of the relationship between units, we obtain that 1 hour is 4.6296296e-05 times 900 days.
Which is the same to say that 900 days is 21600 hours.
Nine hundred days equals to twenty-one thousand six hundred hours. *Approximation
A hour is four times nine hundred days. *Approximation