# Adding the prefix "1" to the number

The task is to **add** the prefix "1" to a number. For example, numbers 4952293042 and 4996382584 should be transformed into **1**4952293042 and **1**4996382584, respectively.

1. Navigate to the "**Routing**" → "**Outbound Routes**" section.

   Click "**Add New Rule**."

   <figure><img src="https://835495363-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsZ8acWnNlSalIHQjMFu1%2Fuploads%2F319Y9fmDCMWCObsQAbvi%2FnewRule.png?alt=media&#x26;token=6ddac52d-1939-4504-95ca-15148d9304cf" alt=""><figcaption><p>Adding a new rule</p></figcaption></figure>
2. Create the pattern as shown in the image:

<figure><img src="https://835495363-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsZ8acWnNlSalIHQjMFu1%2Fuploads%2FhzMK1Y9WN54EHxUslCQ7%2Fnew2.png?alt=media&#x26;token=6ffd51eb-22f2-4179-9c41-7ef28f3df51b" alt=""><figcaption><p>Parameters of the new rule</p></figcaption></figure>

3. Click "**Save**."