Iran dwarfs Russia: about 1,622,847 km² km² against 16,879,701 km² km². At true size Iran is about 10.4× larger — the whole of Russia fits into Iran roughly 10 times.
Iran sits in Asia, Russia in Europe. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 10.4×.
The old map muddied it further: Mercator inflates Iran about 1.4× and Russia about 6.1×, so on a Mercator-style map this pair appears 44.7× apart instead of the true 10.4×.
Iran fits 10× into Russia.