the following is a summary of our floor space by business segment at december 31 , 2010 : ( square feet in millions ) owned leased government- owned total .

<i>(Square feet in millions)</i>
<i>Owned</i>
<i>Leased</i>
<i>Government-Owned</i>
<i>Total</i>
Aeronautics
5.2
3.7
15.2
24.1
Electronic Systems
10.3
11.5
7.1
28.9
Information Systems & Global Solutions
2.6
7.9
—
10.5
Space Systems
8.6
1.6
.9
11.1
Corporate activities
2.9
.8
—
3.7
Total
29.6
25.5
23.2
78.3

some of our owned properties , primarily classified under corporate activities , are leased to third parties .
in the area of manufacturing , most of the operations are of a job-order nature , rather than an assembly line process , and productive equipment has multiple uses for multiple products .
management believes that all of our major physical facilities are in good condition and are adequate for their intended use .
item 3 .
legal proceedings we are a party to or have property subject to litigation and other proceedings , including matters arising under provisions relating to the protection of the environment .
we believe the probability is remote that the outcome of these matters will have a material adverse effect on the corporation as a whole , notwithstanding that the unfavorable resolution of any matter may have a material effect on our net earnings in any particular quarter .
we cannot predict the outcome of legal proceedings with certainty .
these matters include the proceedings summarized in note 14 2013 legal proceedings , commitments , and contingencies beginning on page 78 of this form 10-k .
from time-to-time , agencies of the u.s .
government investigate whether our operations are being conducted in accordance with applicable regulatory requirements .
u.s .
government investigations of us , whether relating to government contracts or conducted for other reasons , could result in administrative , civil , or criminal liabilities , including repayments , fines , or penalties being imposed upon us , or could lead to suspension or debarment from future u.s .
government contracting .
u.s .
government investigations often take years to complete and many result in no adverse action against us .
we are subject to federal and state requirements for protection of the environment , including those for discharge of hazardous materials and remediation of contaminated sites .
as a result , we are a party to or have our property subject to various lawsuits or proceedings involving environmental protection matters .
due in part to their complexity and pervasiveness , such requirements have resulted in us being involved with related legal proceedings , claims , and remediation obligations .
the extent of our financial exposure cannot in all cases be reasonably estimated at this time .
for information regarding these matters , including current estimates of the amounts that we believe are required for remediation or clean-up to the extent estimable , see 201ccritical accounting policies 2013 environmental matters 201d in management 2019s discussion and analysis of financial condition and results of operations beginning on page 45 , and note 14 2013 legal proceedings , commitments , and contingencies beginning on page 78 of this form 10-k .
item 4 .
( removed and reserved ) item 4 ( a ) .
executive officers of the registrant our executive officers are listed below , as well as information concerning their age at december 31 , 2010 , positions and offices held with the corporation , and principal occupation and business experience over the past five years .
there were no family relationships among any of our executive officers and directors .
all officers serve at the pleasure of the board of directors .
linda r .
gooden ( 57 ) , executive vice president 2013 information systems & global solutions ms .
gooden has served as executive vice president 2013 information systems & global solutions since january 2007 .
she previously served as deputy executive vice president 2013 information & technology services from october 2006 to december 2006 , and president , lockheed martin information technology from september 1997 to december 2006 .
christopher j .
gregoire ( 42 ) , vice president and controller ( chief accounting officer ) mr .
gregoire has served as vice president and controller ( chief accounting officer ) since march 2010 .
he previously was employed by sprint nextel corporation from august 2006 to may 2009 , most recently as principal accounting officer and assistant controller , and was a partner at deloitte & touche llp from september 2003 to july 2006. .

Question: Analyse this data from a financial earnings document. what portion of the total floor space is used by aeronautics?
Choices:
0.36909
0.30779
1887.03
0.00031
3.39437
Correct choice index: 1