mvc razor

I'm a newbie to mvc razor. I have a EF generated create form template. I want to input firstname and lastname but would like the fullname field to be pre-populated with values from firstname and lastname entered.

 

Secondly I have a fields for latitude and longitude and input fields for Degree, Minute and Seconds. I would like the user to view the input values e.g 12° 24' 2" for both longitude and latitude and then convert the input values to degree decimal.

 

Then finally save the values to database table.