libgfortran3 software package provides Runtime library for GNU Fortran applications, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libgfortran3
libgfortran3 is installed in your system.
Make ensure the libgfortran3 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgfortran3 *
You will get with libgfortran3 package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Libraries |
| Package | libgfortran3 |
| Version | 4.7.2-5 |
| Description | Runtime library for GNU Fortran applications |
| Sub Section | libs |