Asia dwarfs Tanzania: about 44,580,000 km² km² against 945,781 km² km². At true size Asia is about 47.1× larger — the whole of Tanzania fits into Asia roughly 47 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 47× into Asia.