2の4倍(ばい)は8です。 Four times two makes eight.Four times two is eight.ほかの訳(わけ) (3)Four times two equals eight. 単(たん)語(ご):二(に)四(よん)倍(ばい)八(はち)自(じ)動(どう)照(しょう)合(ごう)