Basically I downloaded some information from that lists population density per a census block group, but their population density calculation doesn't seem to be correct.

Census block ID: 480019501001

total population: 1,437

area: 1824095459

**In UNKNOWN units**
population density: 22.5

**In UNKNOWN units**
The calculation for population density

. Population density is usually in KM or Miles.

I am assuming 1824095459 is in square feet, because anything else wouldn't make sense.

So converting 1824095459 ft to miles = 1824095459/5280= plug into population density equation =

**.004159519 Population density of people per mile**
converting 1824085459 ft to KM = 1824095459/3280.8399= plug into population density equation =

**.002584605 Population density of people per KM**
Neither one of these answers is the 22.5 in unknown units figure they listed as the answer for this block group.

Where did I/they make the mistake?