I could roll that with 17 gallons.
You must have your figures wrong. - 4 litres of paint will not even come close to covering 100 metres square! !
100 litres = 26.4172052358 gallons
well being a two story home not knowing exact size i would tell you bout 20-25 gallons without ceilings go to affordablepainters.biz to get a quote Figure basically 300 Sq Ft per gallon. This will change depending on how porous the siding is and how many coats you are applying. Paint companies recommend two coats for a first rate job. You may be over or under depending but this is a good rule of thumb. Same for the trim.
106
100 US gallons is 378,540 mL
100 liters = 26.42 US gallons.
100 US gallons is about 378.541 liters.
400
There are 748 gallons in 100 cu ft.
100 gallons is 1/2 cubic yard.
0.03 gallons.
100 gallons is 12,800 fluid ounces.