There seems to be a misunderstanding in the question. If you're asking how many letters are in the phrase "40 millalearers," it consists of 14 letters. If you meant something else, please clarify for more accurate assistance!
40 = XL leters = 50 - 10
3 leters
460,000 BPD
1 barrel = 158.9 leters
500
35
7,600
473.2 ml
That is 0.341 litre
11L
800
1 litre (not leters!) = 1000 millilitres so 1.75 litres = 1750 millilitres. Simple!