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So i've searched everywhere and i just can't figure it out how to have decimals until the thousandths and probably more with floating point numbers.

I have some columns that works fine for what i want {0:0>10} , but i need another one that counts more decimals.

E.g., imagine i have some books and different series, but i only have some numbers in each one, and i want to have it all together:

(Collection) - (Number) = Column

1 - 2 - 1.02
1 - 34 - 1.34
1 - 567 - 1.567
2 - 5 - 2.05
2 - 90 - 2.9
2 - 123 - 2.123

So how can i have 1.567 and 2.123 in that column? Thanks.