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
7,600
35
11L
That is 0.341 litre
473.2 ml
800
1 litre (not leters!) = 1000 millilitres so 1.75 litres = 1750 millilitres. Simple!