Hello I need to adjust the number of decimal places for a schedule figure. Not sure how to go about it. I have attached three images showing the process I am going to create the schedule.

Example of changed required:

2.46m Needs to be either:- 2.463m Or 2463mm

What I am Trying to do:

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Element No(Plank No)
Number Of Fixtures - Name Of Fixture - Length Of Fixture
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101
5x - FIAXXZZDS - 2.463m
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Any help would be much appreciated