One of the ways to perform nominalization (turning a phrase into a noun) in Japanese is through the use of the expression
ということ. This grammar point is a combination of
と (the particle), 言（い）う (the verb), and
こと (the noun). Together, the literal translation is close to ‘that (A) is said to be’. However, in reality, it sounds far less formal than this.
To use
ということ, attach it to the end of any phrase (without
です, or ます). In most cases it will be written using hiragana.
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宇宙人（うちゅうじん）はいるということですか？
Does that mean aliens exist?
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一緒（いっしょ）に住（す）んでいるけど付（つ）き合（あ）ってはいない
の？ルームメイトだということだよね？
You are living together, but not dating? So that means they’re your roommate, right?
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あの先生（せんせい）の教（おし）え方（かた）が酷（ひど）いということを聞（き）いた。
I heard that the way that teacher teaches is harsh.
In conversation, という is regularly shortened to simply
って. This form will be heard/seen much more frequently in conversation/manga and similar things.
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これが正（ただ）しいってことですか？
Does that mean that this is correct?
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車（くるま）が壊（こわ）れたの？電車（でんしゃ）でくるってこと？遅（おく）れないで来（き）てね。
Your car broke? Does that mean you are coming by train? Please don’t be late.
ということ is also frequently used when clarifying what someone else has said. In these cases, it translates very similarly to ‘you mean that (A)?’, or ‘you mean to say that (A)?’
Although the kanji 言（い）う and 事（こと） may be used in this expression, the most common form does not use any kanji at all. This is a regular occurance in Japanese, as many set grammatical structures will not use kanji, simply because it makes the pattern easier to identify.