Asia dwarfs Myanmar: about 44,580,000 km² km² against 662,746 km² km². At true size Asia is about 67.3× larger — the whole of Myanmar fits into Asia roughly 67 times.
The old Mercator map treated both about equally (1× vs 1.2× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Myanmar fits 67× into Asia.