Open Office Calc save numeric value in numeric column as text
representation add null chars right for column with.
Bat other applications save value as text and space chars left for
column with.

For example:
Format: N, 3, 0
Value: 1
Calc saved value (hex): 31 00 00
Other Apps saved value (hex): 20 20 31

This inaccuracy does not affect the format of the readers implemented in
C or C++ but can break the implementation in other languages (Python,
Ruby, Haskell)