what was the average beginning and ending balance of shares in millions outstanding during 2010?
Important information:
table_6: the balance december 31 2008 of issued is 1334 ; the balance december 31 2008 of in treasury is -140 ( 140 ) ; the balance december 31 2008 of shares outstanding is 1194 ;
table_11: the balance december 31 2009 of issued is 1334 ; the balance december 31 2009 of in treasury is -139 ( 139 ) ; the balance december 31 2009 of shares outstanding is 1195 ;
table_17: the balance december 31 2010 of issued is 1434 ; the balance december 31 2010 of in treasury is -73 ( 73 ) ; the balance december 31 2010 of shares outstanding is 1361 ;
Reasoning Steps:
Step: add1-1(1361, 1195) = 2556.0
Step: divide0-0(#0, const_2) = 1278
Program:
add(1361, 1195), divide(#0, const_2)
Program (Nested):
divide(add(1361, 1195), const_2)

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
schlumberger limited and subsidiaries shares of common stock issued in treasury shares outstanding ( stated in millions ) .
Table
                                                 | issued | in treasury  | shares outstanding
balance january 1 2008                           | 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              
acquisition of smith international inc .         | 100    | 76           | 176               
shares sold to optionees less shares exchanged   | 2013   | 6            | 6                 
shares issued under employee stock purchase plan | 2013   | 3            | 3                 
stock repurchase program                         | 2013   | -27 ( 27 )   | -27 ( 27 )        
issued on conversions of debentures              | 2013   | 8            | 8                 
balance december 31 2010                         | 1434   | -73 ( 73 )   | 1361              
see the notes to consolidated financial statements part ii , item 8 .
Question: 
what was the average beginning and ending balance of shares in millions outstanding during 2010?
Important information:
table_6: the balance december 31 2008 of issued is 1334 ; the balance december 31 2008 of in treasury is -140 ( 140 ) ; the balance december 31 2008 of shares outstanding is 1194 ;
table_11: the balance december 31 2009 of issued is 1334 ; the balance december 31 2009 of in treasury is -139 ( 139 ) ; the balance december 31 2009 of shares outstanding is 1195 ;
table_17: the balance december 31 2010 of issued is 1434 ; the balance december 31 2010 of in treasury is -73 ( 73 ) ; the balance december 31 2010 of shares outstanding is 1361 ;
Reasoning Steps:
Step: add1-1(1361, 1195) = 2556.0
Step: divide0-0(#0, const_2) = 1278
Program:
add(1361, 1195), divide(#0, const_2)
Program (Nested):
divide(add(1361, 1195), const_2)
