don't drop the last digit, if that zero is there it has a meaning, the figure is precise to that decimal point. That may be (in this case) because that is the kg level (1 MT = 1000 kg).
For the format, see link 1

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Note added at 3 hrs 55 mins (2005-12-10 21:55:43 GMT)
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You need the last decimal point because it indicates that you would have no other value than a zero if you rounded up or down on the next digit.
for instance, a result of 1.10 is precise to the 1/100 level, so the actual value could be at most 1.104 or 1.044, but not 1.105 or higher or even 1.1046(both of which would be rounded up to 1.11 to get two numbers behind the decimal point only).
In science, which I studied, the level of precision of a measurement is important, and I am sure that applies to engineering.
Besides, IMO it is certainly not up to the translator to change figures from the original, and even if you don't believe in it, would it hurt anything to leave the zero, just in case?

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Note added at 3 hrs 56 mins (2005-12-10 21:57:18 GMT)
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One more note, these figures may have been obtained by adding kg values and then expressing them in MT, so that would have been 1,328,620 kg.