Greenland dwarfs Russia: about 2,154,754 km² km² against 16,879,701 km² km². At true size Greenland is about 7.8× larger — the whole of Russia fits into Greenland roughly 7 times.
Greenland sits in North America, 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 7.8×.
The old map muddied it further: Mercator inflates Greenland about 11.8× and Russia about 6.1×, so on a Mercator-style map this pair appears 4× apart instead of the true 7.8×.
Greenland fits 7× into Russia.