Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| City/Municipality | Population (2010) | Area (km²) | Pop. density (per km²) | Income Classification |
| --- | --- | --- | --- | --- |
| Baguio City | 318676.0 | 57.5 | Category:Pages with bad rounding precision | 1st Class |
| La Trinidad, Benguet | 107188.0 | 82.74 | Category:Pages with bad rounding precision | 1st Class |
| Itogon, Benguet | 55960.0 | 450 | Category:Pages with bad rounding precision | 1st Class |
| Sablan, Benguet | 10511.0 | 106 | Category:Pages with bad rounding precision | 5th Class |
| Tuba, Benguet | 42874.0 | 296 | Category:Pages with bad rounding precision | 1st Class |
Question:
When 318676 is the population of 2010 and 1st class is the income classification what is the area in kilometers squared?
Answer:
57.5