How To Use Multiline Text Field as Calculated Column in Sharepoint?

Following are the Steps to use Multiline Text Field as Calculated Column: 

1. Create a Single line text column . ex, Newsfeed

2. Create a calculated column using the above single line text column.(and select number as data type if u renders any html output )

3. Delete the Single line text column created on step1.

4. Create the multi line text column with the same name as single line text column has,ex Newsfeed.

Now the multiline text is used as calculated column ..

Note: If U want to display any string as Html rendering y must follow above steps..