A big room of understanding is a great ______

[loverofenglish]

Hello!
What does "A big room" mean in this context, please?
A big room of understanding is a great ______ also to have a happy family life.
http://d.violet.vn//uploads/resources/240/2138550/preview.swf

 

[e2efour]

If it means anything, it could be a large capacity. The text is clearly not written by a native speaker.
You are asked to fill the blank with one of equipment, fact, tool, result. But the sentence you get with the most suitable of these words is ungrammatical.

 

[loverofenglish]

Thank e2e4.