In Roman numerals...
1000 = M
50 = L
1000 mL = 1 L so 5.1 mL = 0.0051 L. Simple, really!
1 Liter (L)= 1000 milliliters (mL) Divide 1 L by 1000mL, then multiply by 4. This gives you .004 Liters.
1000 mL = 1 L so 30 mL = 0.03 L. Simple, really!
1000 mL = 1 L so 9 mL = 0.009 L. Simple, really!
1000 mL = 1 L so 255 mL = 0.255 L. Simple, really!
1000 mL = 1 L so 350000 mL = 35 L. Simple, really!
1000 mL = 1 L so 20000 mL = 20 L. Simple, really!
1000 mL = 1 L so 6000 mL = 6 L. Simple, really!
1000 mL = 1 L so 30 mL = 0.03 L. Simple, really!
1000 mL = 1 L so 3.82 mL = 0.00382 L. Simple, really!
1000 mL = 1 L so 60 mL = 0.06 L. Simple, really!
1000 mL = 1 L so 275 mL = 0.275 L. Simple, really!