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  1. or download this
    # perl -e 'printf("%.2f", 6.685);'
    6.68
    
  2. or download this
    # perl -v
    This is perl, v5.10.1 (*) built for i386-linux-thread-multi
    
  3. or download this
    # perl -e 'printf("%.2f", 6.685);'
    6.69
    
  4. or download this
    # perl -v
    This is perl, v5.10.1 (*) built for x86_64-linux-thread-multi