Vietnam is about 26 times smaller than Brazil.

Brazil is approximately 8,515,770 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 3.89% the size of Brazil. Meanwhile, the population of Brazil is ~212.8 million people (111.2 million fewer people live in Vietnam).
Tip: This to-scale comparison of Brazil vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles.
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