To calculate the population density, you divide the population by the area.
Given:
- Population of Europe: 748,814,048 people
- Area of Europe: 3,930,000 square miles
The formula for population density is:
\[ \text{Population Density} = \frac{\text{Population}}{\text{Area}} \]
Plugging in the values:
\[ \text{Population Density} = \frac{748,814,048 \text{ people}}{3,930,000 \text{ square miles}} \approx 190.54 \text{ people per square mile} \]
Therefore, the correct answer is:
190.54 people per square mile.