Brazil dwarfs Iran: about 8,499,400 km² km² against 1,622,847 km² km². At true size Brazil is about 5.2× larger — the whole of Iran fits into Brazil roughly 5 times.
Brazil sits in South America, Iran 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 5.2×.
The old map muddied it further: Mercator inflates Brazil about 1× and Iran about 1.4×, so on a Mercator-style map this pair appears 3.9× apart instead of the true 5.2×.
Iran fits 5× into Brazil.