File list of package libgfortran-7-dev in buster of architecture amd64
/usr/lib/gcc/x86_64-linux-gnu/7/libcaf_single.a /usr/lib/gcc/x86_64-linux-gnu/7/libgfortran.a /usr/lib/gcc/x86_64-linux-gnu/7/libgfortran.so /usr/share/doc/libgfortran-7-dev
/usr/lib/gcc/x86_64-linux-gnu/7/libcaf_single.a /usr/lib/gcc/x86_64-linux-gnu/7/libgfortran.a /usr/lib/gcc/x86_64-linux-gnu/7/libgfortran.so /usr/share/doc/libgfortran-7-dev