Does an acting president complete the term?

[Sir Mohamed]

Does an acting president also complete the ongoing term?

I think of the following scenario: Something happens to the president and the vice president six months after taking office. So, three and a half years remain till the term is over. The Speaker now becomes acting president. Does he finish the ongoing term or not? Does he have to appoint a new Vice President, since he assumes all presidential powers and duties? If so, a new Vice President would usually assume the presidency immediately since there is no full, just an acting, president. Or remains that office also vacant? I assume you can’t have a full Vice President (appointed and confirmed by congress), serving under an acting president. And an acting VP doesn’t exist according to Wikipedia.