Argentina dwarfs Canada: about 2,782,703 km² km² against 9,872,102 km² km². At true size Argentina is about 3.5× larger — the whole of Canada fits into Argentina roughly 3 times.
Argentina sits in South America, Canada in North America. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 3.5×.
The old map muddied it further: Mercator inflates Argentina about 1.5× and Canada about 4.1×, so on a Mercator-style map this pair appears 9.8× apart instead of the true 3.5×.
Argentina fits 3× into Canada.