How many queries run in a looker studio report?

I'm trying to figure out how many queries run in my looker studio reporte. I realized that is not that simple as count the elements (graphs, tables, etc). For example in a report I have 3 elements , 2 graphs with 2 metrics each other and a filter, and I see that is executing 6 queries, I don't know why. (it's a connection to a looker model).

Can you hepl me pls?

Regards

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