Many online forms request a user's phone number including the area code and country code. We need to store the phone number in our user database. Unfortunately, people like to enter their phone number in a particular way that doesn't match the way that we'd like to store it. We will let the user enter the phone number how they like and our method will convert it to the way that we'd like to store it.

Our users will enter an 12 digit number like this:
Caaaxxxxxxx

where C is a one digit country code, aaa is the area code and each x is a numeric digit.
Our database wants the phone number formatted like this:
(aaa) xxx-xxxx
Your method should convert the string of numbers into a new string that is formatted properly for our database. We don't care about the country code so we will not include it in the database.

NOTE: The user's phone number is a String of numeric digits, not an actual number!