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:
| Institution | Location | Founded | Affiliation | Enrollment | Team Nickname |
| --- | --- | --- | --- | --- | --- |
| Ferris State University | Big Rapids, Michigan | 1884.0 | Public | 13532.0 | Bulldogs |
| Grand Valley State University | Allendale, Michigan | 1960.0 | Public | 23892.0 | Lakers |
| Miami University (OH) | Oxford, Ohio | 1809.0 | Public | 20126.0 | RedHawks |
| Michigan State University | East Lansing, Michigan | 1855.0 | Public | 46045.0 | Spartans |
| University of Michigan | Ann Arbor, Michigan | 1817.0 | Public | 40042.0 | Wolverines |
| Ohio State University | Columbus, Ohio | 1870.0 | Public | 60347.0 | Buckeyes |
Question:
what is the least enrollment when founded after 1809 and the institution is university of michigan?
Answer:
40042.0