NOTE! Как is used as a question word how. It is easily combined with almost any noun or pronoun.
Как ты? / Как вы? – How are you? (informal / formal)
Как рабо́та? – How is your job?
However, it can also mean “as” or “like”
Всё как обы́чно – Everything is as usual.
Ничего́ – nothing
У меня́ ничего́ нет. – I have nothing.
However, when ничего́ is used as a one-word sentence (answer) it has another meaning. We’ll see this in the next dialogue.