{"pre_text": ["of exercise for stock options exercised or at period end for outstanding stock options , less the applicable exercise price .", "the company issued new shares to satisfy exercised stock options .", "compensation expense the company recorded $ 43 million , $ 34 million , and $ 44 million of expense related to stock awards for the years ended december 31 , 2015 , 2014 , and 2013 , respectively .", "the company recorded $ 17 million , $ 13 million , and $ 17 million as a tax benefit related to stock awards and stock options for the years ended december 31 , 2015 , 2014 , and 2013 , respectively .", "the company recognized tax benefits for the years ended december 31 , 2015 , 2014 , and 2013 , of $ 41 million , $ 53 million , and $ 32 million , respectively , from the issuance of stock in settlement of stock awards , and $ 4 million , $ 5 million , and $ 4 million for the years ended december 31 , 2015 , 2014 , and 2013 , respectively , from the exercise of stock options .", "unrecognized compensation expense as of december 31 , 2015 , the company had less than $ 1 million of unrecognized compensation expense associated with rsrs granted in 2015 and 2014 , which will be recognized over a weighted average period of 1.0 year , and $ 25 million of unrecognized expense associated with rpsrs granted in 2015 , 2014 , and 2013 , which will be recognized over a weighted average period of 0.6 years .", "as of december 31 , 2015 , the company had no unrecognized compensation expense related to stock options .", "compensation expense for stock options was fully recognized as of december 31 , 2013 .", "20 .", "unaudited selected quarterly data unaudited quarterly financial results for the years ended december 31 , 2015 and 2014 , are set forth in the following tables: ."], "post_text": ["( 1 ) in the second quarter of 2015 , the company recorded a $ 59 million goodwill impairment charge .", "during the same period , the company recorded $ 136 million of operating income as a result of the aon settlement .", "( 2 ) in the fourth quarter of 2015 , the company recorded $ 16 million goodwill impairment and $ 27 million intangible asset impairment charges. ."], "table": [["( $ in millions except per share amounts )", "year ended december 31 2015 1st qtr", "year ended december 31 2015 2nd qtr ( 1 )", "year ended december 31 2015 3rd qtr", "year ended december 31 2015 4th qtr ( 2 )"], ["sales and service revenues", "$ 1570", "$ 1745", "$ 1800", "$ 1905"], ["operating income ( loss )", "156", "269", "200", "144"], ["earnings ( loss ) before income taxes", "133", "244", "175", "80"], ["net earnings ( loss )", "87", "156", "111", "50"], ["dividends declared per share", "$ 0.40", "$ 0.40", "$ 0.40", "$ 0.50"], ["basic earnings ( loss ) per share", "$ 1.80", "$ 3.22", "$ 2.31", "$ 1.07"], ["diluted earnings ( loss ) per share", "$ 1.79", "$ 3.20", "$ 2.29", "$ 1.06"]], "table_ori": [["", "Year Ended December 31, 2015"], ["($ in millions, except per share amounts)", "1st Qtr", "2nd Qtr<sup>(1)</sup>", "3rd Qtr", "4th Qtr<sup>(2)</sup>"], ["Sales and service revenues", "$1,570", "$1,745", "$1,800", "$1,905"], ["Operating income (loss)", "156", "269", "200", "144"], ["Earnings (loss) before income taxes", "133", "244", "175", "80"], ["Net earnings (loss)", "87", "156", "111", "50"], ["Dividends declared per share", "$0.40", "$0.40", "$0.40", "$0.50"], ["Basic earnings (loss) per share", "$1.80", "$3.22", "$2.31", "$1.07"], ["Diluted earnings (loss) per share", "$1.79", "$3.20", "$2.29", "$1.06"]]}

Question: between 2015 and 2013 what was the average compensation expense related to the issuing of the stock award in millions
Evidence:
text_2: compensation expense the company recorded $ 43 million , $ 34 million , and $ 44 million of expense related to stock awards for the years ended december 31 , 2015 , 2014 , and 2013 , respectively .
Program: add(43, 34), add(#0, 44), divide(#1, const_3)
Answer:
str_answer: 40.3
exe_answer: 40.33333