North America dwarfs Tanzania: about 24,710,000 km² km² against 945,781 km² km². At true size North America is about 26.1× larger — the whole of Tanzania fits into North America roughly 26 times.
The old Mercator map treated both about equally (1× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Tanzania fits 26× into North America.