Europe dwarfs Kazakhstan: about 10,180,000 km² km² against 2,712,747 km² km². At true size Europe is about 3.8× larger — the whole of Kazakhstan fits into Europe roughly 3 times.
The old Mercator map treated both about equally (1× vs 2.3× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Kazakhstan fits 3× into Europe.