Because 'L' is the first letter of the word "liter" when properly spelled.
Therefor, when you see the letter 'L', it reminds you of the word 'liter',
much more than it reminds you of the words 'gallon', 'meter', or 'week'.
k = kilo = thousand 2340 L (whatever they are - liters is abbreviated l [small L])
L is the abbreviation for liters, so 1.4 L is 1.4 liters.
2 L = 2 L
l
molarity abbreviated M
.053 L
3.5 L
When you are showing length in Math, it is marked as an "l"
L
0.153 L
2 L
0.03 L