To find out how many hours are in a year, we need to convert years into months, months into days, then days into hours.
There are 12 months in a year. Multiply a year by the 12 months:

There are 365 days in a year. Therefore, there will be 365 days in 12 months.
There are 24 hours in a day. Multiply the amount of hours in a day by the amount of days:

There are 8760 hours in a year.
The question asks for the amount of hours in 5 years. We know that there are 8760 hours in a year, so multiply this amount by the total amount of years. The following product will be your answer:
