Asia dwarfs Madagascar: about 44,580,000 km² km² against 594,622 km² km². At true size Asia is about 75× larger — the whole of Madagascar fits into Asia roughly 74 times.
The old Mercator map treated both about equally (1× vs 1.1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Madagascar fits 74× into Asia.