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$ bc -v 
bc 1.07.1
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.

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$ bc -h
usage: bc [options] [file ...]
-h  --help         print this usage and exit
-i  --interactive  force interactive mode
-l  --mathlib      use the predefined math routines
-q  --quiet        don't print initial banner
-s  --standard     non-standard bc constructs are errors
-w  --warn         warn about non-standard bc constructs
-v  --version      print version information and exit

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[root@dev127 myb]# echo 'scale=3; 3/2'
scale=3; 3/2
[root@dev127 myb]# echo 'scale=3; 3/2' | bc
1.500
[root@dev127 myb]# 

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[root@dev127 myb]# bc
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 
5/3
1
scale=5;5/3
1.66666
exit
0
^C

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[root@dev127 myb]# echo "obase=2;3" |bc
11

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[root@dev127 myb]# echo "obase=16;11" |bc
B

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[root@dev127 myb]# echo "obase=16;ibase=2;11" |bc
F

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[root@dev127 myb]# echo "obase=10;ibase=2;11" |bc
3

[root@dev127 myb]# echo "obase=10;ibase=2;1111" |bc
15

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[root@dev127 myb]# echo "sqrt(100)" |bc
10

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[root@dev127 myb]# echo "10^3;10^2;3^5" |bc
1000
100
243