Pakistan dwarfs South America: about 873,772 km² km² against 17,840,000 km² km². At true size Pakistan is about 20.4× larger — the whole of South America fits into Pakistan roughly 20 times.
The old Mercator map treated both about equally (1.3× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Pakistan fits 20× into South America.