How much is 19 out of 51 times 34? It's a process, please

How much is 19 out of 51 times 34? It's a process, please


 



Time calculator, for example, now 10:51, then add 3 hours and 18 minutes, what time is it
Algorithm I will, before learning geography, computing time zone is much more complex than this.. The above is just an example.. What I want is a tool for multiple use..


10:51+3:18=13:69=14:09
The rate of the hour and the minute is 60