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:
| Rank | Common of | Population | Area (km 2 ) | Density (inhabitants/km 2 ) | Altitude (mslm) |
| --- | --- | --- | --- | --- | --- |
| 1st | Torino | 907563.0 | 130.7 | 6943.9 | 239.0 |
| 2nd | Moncalieri | 58320.0 | 47.3 | 1233.0 | 260.0 |
| 3rd | Collegno | 50137.0 | 18.0 | 2785.4 | 302.0 |
| 4th | Rivoli | 49591.0 | 29.2 | 1698.3 | 352.0 |
| 5th | Nichelino | 48946.0 | 20.4 | 2399.3 | 229.0 |
| 6th | Settimo Torinese | 47988.0 | 32.7 | 1467.5 | 207.0 |
| 7th | Grugliasco | 37870.0 | 13.0 | 2913.1 | 293.0 |
| 8th | Chieri | 36168.0 | 50.0 | 723.4 | 376.0 |
| 9th | Pinerolo | 36158.0 | 54.0 | 667.0 | 305.0 |
| 10th | Venaria Reale | 34859.0 | 20.0 | 1743.0 | 262.0 |
Question:
How much Area (km 2) has a Common of collegno, and a Population smaller than 50137?
Answer:
0.0