Let's find out how many seconds are in an hour.
As you know, there are `60`

seconds in a minute,
and `60`

minutes in an hour. Therefore,
to find the number of seconds in an hour, you
need to multiply `60`

by `60`

:

`alert(60 * 60);`

Find the number of seconds in a day.

Find the number of seconds in `30`

days.

Find the number of seconds in a year.

Find the number of minutes in a day.

Find the number of minutes in a year.

Find the number of bytes in a megabyte.

Find the number of bytes in a gigabyte.

Find the number of bytes in `10`

gigabytes.

Find the number of bytes in a terabyte.

Find the number of kilobytes in a terabyte.