How to calculate time difference, and return time in hours ?

 
if I have two times in this format 1167736680 from functions in MT4 Time() or OrderOpenTime().

I want to calculate Hours between two datetime numbers as above, how is that done ?
 
mql time is nothing more than a number of seconds, so difeerence in hours is:

(time1-time2)/3600.0 make it a double to get fractional hours.
Reason: