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 | Film | Year | Opening Weekend\n(three day) | Inflation-adjusted\n(2014 USD) |
| --- | --- | --- | --- | --- |
| 1 | Marvel's The Avengers | 2012 | $207,438,708 | $213,091,480 |
| 2 | Iron Man 3 | 2013 | $174,144,585 | $176,308,953 |
| 3 | Harry Potter and the Deathly Hallows – Part 2 | 2011 | $169,189,427 | $177,373,590 |
| 4 | The Dark Knight Rises | 2012 | $160,887,295 | $165,271,526 |
| 5 | The Dark Knight | 2008 | $158,411,483 | $173,518,111 |
| 6 | The Hunger Games: Catching Fire | 2013 | $158,074,286 | $160,038,924 |
| 7 | The Hunger Games | 2012 | $152,535,747 | $156,692,396 |
| 8 | Spider-Man 3 | 2007 | $151,116,516 | $171,876,545 |
| 9 | The Twilight Saga: New Moon | 2009 | $142,839,137 | $157,018,918 |
| 10 | The Twilight Saga: Breaking Dawn - Part 2 | 2012 | $141,067,634 | $144,911,773 |
| 11 | The Twilight Saga: Breaking Dawn - Part 1 | 2011 | $138,122,261 | $144,803,619 |
| 12 | Pirates of the Caribbean: Dead Man's Chest | 2006 | $135,634,554 | $158,673,173 |
| 13 | Iron Man 2 | 2010 | $128,122,480 | $138,563,103 |
| 14 | Harry Potter and the Deathly Hallows – Part 1 | 2010 | $125,017,372 | $135,204,962 |
| 15 | Shrek the Third | 2007 | $121,629,270 | $138,338,411 |
| 16 | Man of Steel | 2013 | $116,619,362 | $118,068,774 |
| 17 | Alice in Wonderland | 2010 | $116,101,023 | $125,562,025 |
| 18 | Spider-Man | 2002 | $114,844,116 | $150,582,840 |
| 19 | Pirates of the Caribbean: At World's End | 2007 | $114,732,820 | $130,494,543 |
| 20 | Toy Story 3 | 2010 | $110,307,189 | $119,296,055 |
| 21 | Transformers: Revenge of the Fallen | 2009 | $108,966,307 | $119,783,499 |
| 22 | Star Wars Episode III: Revenge of the Sith | 2005 | $108,435,841 | $130,939,650 |
| 23 | Shrek 2 | 2004 | $108,037,878 | $134,895,074 |
| 24 | X-Men: The Last Stand | 2006 | $102,750,665 | $120,203,691 |
| 25 | Harry Potter and the Goblet of Fire | 2005 | $102,685,961 | $123,996,491 |
| 26 | Indiana Jones and the Kingdom of the Crystal Skull | 2008 | $100,137,835 | $109,687,301 |
Question:
what is the average opening weekend gross between iron man 3 and the dark knight?
Answer:
$166,278,034