Terms for subject Idiomatic containing as ... as can be

English	Russian
as can be easily guessed	как можно легко догадаться (george serebryakov)
as clear as can be	как дважды два (Taras)
as plain as can be	как дважды два (Taras)
that was as stupid as you can get	дурнее не придумаешь (Andrey Truhachev)
that was as stupid as you can get	курам на смех (Andrey Truhachev)
that was as stupid as you can get	глупее не придумаешь (Andrey Truhachev)