Yet another a bit "special" solution, but I would say it is not against the (current) rules, it's just a matter of interpretation.
$ VII = 111 $
Roman $7$ = Binary $7$
And another one...
$$ | -11 | = 11 $$ $$ abs(-11) = 11 $$
...and another one...
$ II = 10 $
Roman $2$ = Binary $2$