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:
| District | Incumbent | Party | First elected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| South Carolina 2 | William Lowndes | Democratic-Republican | 1810 | Re-elected | William Lowndes (DR) 100% |
| South Carolina 4 | John J. Chappell | Democratic-Republican | 1812 | Re-elected | John J. Chappell (DR) |
| South Carolina 5 | David R. Evans | Democratic-Republican | 1812 | Retired Democratic-Republican hold | William Woodward (DR) |
| South Carolina 6 | John C. Calhoun | Democratic-Republican | 1810 | Re-elected | John C. Calhoun (DR) Benjamin C. Yancey (DR) |
| South Carolina 7 | Elias Earle | Democratic-Republican | 1804 1810 | Lost re-election Democratic-Republican hold | John Taylor (DR) 75.4% Elias Earle (DR) 24.1% |
| South Carolina 8 | Samuel Farrow | Democratic-Republican | 1812 | Retired? Democratic-Republican hold | Thomas Moore (DR) Bowen (F) Samuel Farrow (DR) |
Question:
How many districts have John C. Calhoun as the incumbent?
Answer:
1.0