Canada dwarfs Mongolia: about 9,872,102 km² km² against 1,560,428 km² km². At true size Canada is about 6.3× larger — the whole of Mongolia fits into Canada roughly 6 times.
Canada sits in North America, Mongolia in Asia. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 6.3×.
The old map muddied it further: Mercator inflates Canada about 4.1× and Mongolia about 2.2×, so on a Mercator-style map this pair appears 12.1× apart instead of the true 6.3×.
Mongolia fits 6× into Canada.