Los Angeles is about 6 times smaller than Ho Chi Minh City.

Ho Chi Minh City is approximately 6,773 sq km, while Los Angeles (including the city proper only) is approximately 1,215 sq km, making Los Angeles 17.94% the size of Ho Chi Minh City.
Tip: This to-scale comparison of Ho Chi Minh City vs. Los Angeles uses the Mercator projection, which distorts the size of regions near the poles.
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