Democratic Republic of the Congo dwarfs United States: about 2,334,703 km² km² against 9,439,424 km² km². At true size Democratic Republic of the Congo is about 4× larger — the whole of United States fits into Democratic Republic of the Congo roughly 4 times.
Democratic Republic of the Congo sits in Africa, United States 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 4×.
The old map muddied it further: Mercator inflates Democratic Republic of the Congo about 1× and United States about 2×, so on a Mercator-style map this pair appears 8× apart instead of the true 4×.
Democratic Republic of the Congo fits 4× into United States.