bash math converter

root@ubuntu:~# echo 'obase=17;1234' | bc
 04 04 10

root@ubuntu:~# echo 'obase=8;1234' | bc
2322

root@ubuntu:~# echo 'obase=2;1234' | bc
10011010010

root@ubuntu:~# echo 'obase=10;1234' | bc
1234