You can copy and paste microsoft office 2013 pro plus key as below image :
After you install with these keys , you can use MS office 2013 pro plus.
If you want to activate by phone for free then use this method:
1.Install Office 2013 pro plus.
2.Before activate, disconnect internet, open Word 2013.
3.Enter the activation key above.
4.Activation wizard click phone activation.
5.Select US and use skype for free call above free number. This step you can reconnect internet again
6.Dial phone and if you have been ask:
Q:Product key for home or business
A:Home [Dial 1]
after giving installation ID final question
Q:How many computer you want to use it
A:1 [Dial 1]
7.You will get Confirmation ID. Use the Conf. ID then next to activate it.