dc: base16 to base10

dc is a reverse-polish desk calculator

echo "2i 100 p"|dc
says: 100 is of base2 give o/p in base 10

echo "16i 100 p"|dc
says: 100 is of base16 give o/p in base 10

echo "16o 10i 100 p"|dc -- read 100 in base10 and o/p in base16
echo "2o 10i 100 p"|dc -- read 100 in base10 and o/p in base2