I assume that you mean millilitres and litres.
1 litre = 1000 millilitres so 15.3 litres = 15.3*1000 = 15300 millilitres. Simple!
there is 1000 millileters in 1 leter so in 10 leters there is 10,000 millileters 10 is more than 1000 millileters 10L>1000mL
a million
3 leters
14.79ml
1000
100 ml
1.792
2000
3000 mls
1500 milliliters
0.04 L
1000