use Base;
$hex = new Base 16 => 'FF';
print $hex;            # Stringify
# FF
print $hex->binary;    # Return value only ($hex->binary is an alias for $hex->base 2)
# 11111111
print $hex;
# FF
print $hex->to_binary; # Change value
# 11111111
print $hex;
# 11111111