This is a deductive reasoning.
A deductive reasoning is the use of logic rules to make conclusions from premises considered to be true.
Every statement like 60 seconds are in a minute, and 60 minutes are in a hour, and 24 hours are in a day is a premise.
The conclusion is that there are 86,400 seconds in a day, which comes from:
24 hours / day * 60 minutes / hour * 60 second / minute = 86,400 second / day.
