Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: class a ordinary shares of aon plc are , at present , eligible for deposit and clearing within the dtc system . in connection with the closing of the merger , we entered into arrangements with dtc whereby we agreed to indemnify dtc for any stamp duty and/or sdrt that may be assessed upon it as a result of its service as a depository and clearing agency for our class a ordinary shares . in addition , we have obtained a ruling from hmrc in respect of the stamp duty and sdrt consequences of the reorganization , and sdrt has been paid in accordance with the terms of this ruling in respect of the deposit of class a ordinary shares with the initial depository . dtc will generally have discretion to cease to act as a depository and clearing agency for the class a ordinary shares . if dtc determines at any time that the class a ordinary shares are not eligible for continued deposit and clearance within its facilities , then we believe the class a ordinary shares would not be eligible for continued listing on a u.s . securities exchange or inclusion in the s&p 500 and trading in the class a ordinary shares would be disrupted . while we would pursue alternative arrangements to preserve our listing and maintain trading , any such disruption could have a material adverse effect on the trading price of the class a ordinary shares . item 1b . unresolved staff comments . item 2 . properties . we have offices in various locations throughout the world . substantially all of our offices are located in leased premises . we maintain our corporate headquarters at 8 devonshire square , london , england , where we occupy approximately 225000 square feet of space under an operating lease agreement that expires in 2018 . we own one building at pallbergweg 2-4 , amsterdam , the netherlands ( 150000 square feet ) . the following are additional significant leased properties , along with the occupied square footage and expiration . property : occupied square footage expiration . <table class='wikitable'><tr><td>1</td><td>property:</td><td>occupiedsquare footage</td><td>leaseexpiration dates</td></tr><tr><td>2</td><td>4 overlook point and other locations lincolnshire illinois</td><td>1224000</td><td>2017 2013 2024</td></tr><tr><td>3</td><td>2601 research forest drive the woodlands texas</td><td>414000</td><td>2020</td></tr><tr><td>4</td><td>dlf city and unitech cyber park gurgaon india</td><td>413000</td><td>2014 2013 2015</td></tr><tr><td>5</td><td>200 e . randolph street chicago illinois</td><td>396000</td><td>2028</td></tr><tr><td>6</td><td>2300 discovery drive orlando florida</td><td>364000</td><td>2020</td></tr><tr><td>7</td><td>199 water street new york new york</td><td>319000</td><td>2018</td></tr><tr><td>8</td><td>7201 hewitt associates drive charlotte north carolina</td><td>218000</td><td>2015</td></tr></table> the locations in lincolnshire , illinois , the woodlands , texas , gurgaon , india , orlando , florida , and charlotte , north carolina , each of which were acquired as part of the hewitt acquisition in 2010 , are primarily dedicated to our hr solutions segment . the other locations listed above house personnel from both of our reportable segments . in november 2011 , aon entered into an agreement to lease 190000 square feet in a new building to be constructed in london , united kingdom . the agreement is contingent upon the completion of the building construction . aon expects to move into the new building in 2015 when it exercises an early break option at the devonshire square location . in september 2013 , aon entered into an agreement to lease up to 479000 square feet in a new building to be constructed in gurgaon , india . the agreement is contingent upon the completion of the building construction . aon expects to move into the new building in phases during 2014 and 2015 upon the expiration of the existing leases at the gurgaon locations . in general , no difficulty is anticipated in negotiating renewals as leases expire or in finding other satisfactory space if the premises become unavailable . we believe that the facilities we currently occupy are adequate for the purposes for which they are being used and are well maintained . in certain circumstances , we may have unused space and may seek to sublet such space to third parties , depending upon the demands for office space in the locations involved . see note 9 "lease commitments" of the notes to consolidated financial statements in part ii , item 8 of this report for information with respect to our lease commitments as of december 31 , 2013 . item 3 . legal proceedings . we hereby incorporate by reference note 16 "commitments and contingencies" of the notes to consolidated financial statements in part ii , item 8 of this report. .
Question: during the year of 2020, what is the amount of square feet of the occupied space that will expire?
Answer: 778000.0
Question: and what is the total square feet of the new buildings to be constructed in london and gurgaon, combined?

user
669000.0
assistant