Africa dwarfs Ethiopia: about 30,370,000 km² km² against 1,131,761 km² km². At true size Africa is about 26.8× larger — the whole of Ethiopia fits into Africa 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.
Ethiopia fits 26× into Africa.