# Practical usage of operations in JavaScript

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.

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