None, since there can be no conversion. A millimetre is a measure of length in 1-dimensional space while a litre is a measure of volume in 3-dimensional space. The two measure different characteristics and, according to the most basic principles of dimensional analysis, any attempt at comparisons or conversions between the two are fundamentally flawed.
7000 ml
7L is about 7.4qt (US).
around 2 gallons per 65 miles
1400 teaspoons (7000ml/5ml)
153 mm
180 mm
100 mm
6450 mm
135 mm.
304.8 mm
8500 mm
3,000 mm