Wife and I moved into an 60 year old (or so) row home with apparently
original door knob closures. Sorry don't know the techinical word.

The door or the knobs are out of alignment, and no matter how hard you
push the door against the door jamb, you can't get the doorknob tongue
(the metal part that sticks out) to go into the doorjamb recess metal
thingy (the part where the doorknob tongue goes into).

The previous owners put those brass looking doorknobs with crystal
clear doorknobs and brass plates... but never did anything about the
doorknob part on the doorjamb itself.

What do i do to repair this?