Asia dwarfs Chad: about 44,580,000 km² km² against 1,270,927 km² km². At true size Asia is about 35.1× larger — the whole of Chad fits into Asia roughly 35 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.
Chad fits 35× into Asia.