| 251 |
| 2008×2009 |
| 251 |
| 2009×2010 |
=251×（
| 1 |
| 2008×2009 |
| 1 |
| 2009×2010 |
=251×（
| 1 |
| 2008 |
| 1 |
| 2009 |
| 1 |
| 2009 |
| 1 |
| 2010 |
=251×
| 2 |
| 2008×2010 |
=
| 1 |
| 8040 |
故答案为：
| 1 |
| 8040 |
| 251 |
| 2008×2009 |
| 251 |
| 2009×2010 |
| 251 |
| 2008×2009 |
| 251 |
| 2009×2010 |
| 1 |
| 2008×2009 |
| 1 |
| 2009×2010 |
| 1 |
| 2008 |
| 1 |
| 2009 |
| 1 |
| 2009 |
| 1 |
| 2010 |
| 2 |
| 2008×2010 |
| 1 |
| 8040 |
| 1 |
| 8040 |