Rome is about 6 times bigger than Fremont.

Fremont (map shows its 28 named neighbourhoods; the area covers the whole city) is approximately 202 sq km, while Rome is approximately 1,287 sq km, making Rome 536% larger than Fremont.
Tip: This to-scale comparison of Fremont vs. Rome uses the Mercator projection, which distorts the size of regions near the poles.
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