Auto explicative tips for the command line calculator:
(base conversion and real numbers)
$bc
ibase=2
1001
9
1001+10
11
ibase=2
obase=2
100+1+1
110
3/2
1
scale=2
3/2
1.50
ibase=16
FF
255
FFFF
65535
obase=16
1
1
2
2
9
9
10
A
14
E
15
F
16
10