Hello! Could you tell me what it means - to

Hello!

Could you tell me what it means - to have a lot of input?

Maybe, it means a good result?

Thank you.

Im not an English native speaker but i hope it helps:

INPUT: thats when you are LISTENING OR READING, on the foreign language (here you are absorbing the language)

OUTPUT: thats when you are TALKING OR WRITING on the foreign language (here you must produce the language YOURSELF)

So to have “a lot of input” it basicly means to have a lot “of listening and reading” on the target language.

Pretty much.

I wonder if 147 units of input is enough.

No, input means that you have to read and listen to the language a lot.

"There are a hundred and forty-seven great works reposing in the bosoms of a hundred and forty-seven great men, and the tragic thing is that not one of those hundred and forty-seven great works will ever be written. And yet the world goes on.”
http://www.bookrags.com/ebooks/351/82.html#gsc.tab=0