One light-year is defined by astronomers to be the distance that a beam of light will travel in one year (365 days). If the speed of light is 186,000 miles per second, how many miles are in a light year? Express your answer in scientific notation.

Let's see.

One day = 24 hours

One hour = 3600 seconds

24(3600) = 86,000 seconds in one year

I am stuck here.