Please answer the given financial question based on the context.
Context: part ii , item 8 schlumberger limited and subsidiaries shares of common stock ( stated in millions ) issued in treasury shares outstanding .
||issued|in treasury|shares outstanding|
|balance january 1 2007|1334|-156 ( 156 )|1178|
|shares sold to optionees less shares exchanged|2013|14|14|
|shares issued under employee stock purchase plan|2013|2|2|
|stock repurchase program|2013|-16 ( 16 )|-16 ( 16 )|
|issued on conversions of debentures|2013|18|18|
|balance december 31 2007|1334|-138 ( 138 )|1196|
|shares sold to optionees less shares exchanged|2013|5|5|
|shares issued under employee stock purchase plan|2013|2|2|
|stock repurchase program|2013|-21 ( 21 )|-21 ( 21 )|
|issued on conversions of debentures|2013|12|12|
|balance december 31 2008|1334|-140 ( 140 )|1194|
|shares sold to optionees less shares exchanged|2013|4|4|
|vesting of restricted stock|2013|1|1|
|shares issued under employee stock purchase plan|2013|4|4|
|stock repurchase program|2013|-8 ( 8 )|-8 ( 8 )|
|balance december 31 2009|1334|-139 ( 139 )|1195|
see the notes to consolidated financial statements .
Question: how many shares were repurchased in this period?
Answer:
45000000.0