How many people live in the capital city of argentina?

According to the 2010 Census, there are 40,117,096 people in Argentina. Argentina has an area of 2,780,400 square kilometers. Simple division then shows that the population density is about 14.4 people per square kilometer.

There are 1,000,000 square meters in a square kilometer so 14.4 people per square kilometer becomes 0.00000144 people per square meter.

It is much more sensible to talk about numbers of people per square kilometer.