Seoul is about 4.5 times bigger than Fargo.

Fargo (map shows its 38 named neighbourhoods; the area covers the whole city) is approximately 133 sq km, while Seoul is approximately 605 sq km, making Seoul 354% larger than Fargo.
Tip: This to-scale comparison of Fargo vs. Seoul uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.