How can I express...
Dije "lo que pones en, es lo que obtienes fuera."

I wanted to say "what you put in is what you get out" or better yet, "you get what you put in"

How can I express that in spanish?

Question

How can I express...
Dije "lo que pones en, es lo que obtienes fuera."

I wanted to say "what you put in is what you get out" or better yet, "you get what you put in"

How can I express that in spanish?

Answer

En español decimos "lo que das es lo que recibes"

Answer

Ok you can say it in one of these ways:
1. Lo que pones dentro, lo pones fuera - This is the exact translation from English to Spanish. 
However, this sounds more natural to me:
2. Lo que das es lo que recibes - You receive what you give
3. Lo que mereces es lo que ganas - You get what you deserve
I strongly recommend you the second one because it is the easiest one.

Answer

lo que pones dentro , lo pones fuera

Answer

En español el refrán es " Cada uno da lo que recibe"

Answer

Viéndolo del punto de vista muy connotativo es "todo lo que haces se paga" (karma)