Republic of the Congo is about 6,980 times bigger than Bouvet Island.

Bouvet Island is approximately 49 sq km, while Republic of the Congo is approximately 342,000 sq km, making Republic of the Congo 697,859% larger than Bouvet Island.
Tip: This to-scale comparison of Bouvet Island vs. Republic of the Congo uses the Mercator projection, which distorts the size of regions near the poles.