I can't figure out why bc tool sometimes ignores the scale option.

Here is an example:

> echo 'scale=2; 2.777 - 1.4744' | bc
1.3026

Expected result is:

1.30

Additional information:

> bash --version
GNU bash, version 2.05b.0(1)-release (x86_64-suse-linux)
Copyright (C) 2002 Free Software Foundation, Inc.
> bc --version
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
linux bash bc
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