Reconcile graph resolutions

I have Graph A which is 2K, and Graph B which is 4K. I'm overlaying B over A such that the result should be 4K. What I want to accomplish is that A will tile 2x2 (or 4x4, etc.) to match the resolution of B.

I could include a number of tile generators for each output of A and expose the X and Y counts to the user, but what I really hope to accomplish is for A to automatically tile to match the resolution of B.

Is there a mechanism for this?

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