Just curious, how much does a McDonald's Big Mac cost in Seoul?
A big mac meal in Seoul runs about $6. I think the sandwich is about $4. I wouldn't know offhand since I've only ever eaten once at a McDonald's in Korea, and that was 8 years ago.
Here's a relatively good list of costs in Korea.
$1 ~ 1,000 Won.
For some tiers, drivers have to have 5-10 years of accident free driving - in Seoul that's remarkable.
Here's an example fare: $2.50 to pickup and go 2km, about $.70 a km after. Gangnam to Gyeongbokgung palace (across most of the city and over a major river) will run you about $15.
A trip from Brooklyn to Harlem, about the same distance and complexity, is likely to run $30-40. Uber will run you $40-50.