Democratic Republic of the Congo covers 2,334,703 km² km² on the new Equal Earth world map — 1.7%% of all land on Earth, making it the 10th largest country in the world and the 1st largest in Africa. At 3° latitude Mercator only inflates Democratic Republic of the Congo by about 0%%, so the old and new maps largely agree on it — unlike the far north, where Mercator's stretch is dramatic.
For scale: Democratic Republic of the Congo is roughly the same size as Algeria (2,322,788 km² km²).
You could fit 3 of Zambia inside Democratic Republic of the Congo.