The Excel MMULT function returns the matrix product of two arrays.

To recreate the MMULT function in Anaplan:

Create three lists for the matrix dimensions (in this example, I, J, and K).
Add a parent item to list K to sum intermediate products.
Create two modules, Matrix A and Matrix B, to use as input matrices.
- Configure Matrix A with one line item, Value, as Pages, the list I set as Rows, and the list K as Columns.
- Configure Matrix B with one line item, Value set as Pages, the list K set as Rows, and the list J as Columns.
  The column count of Matrix B must match the row count of Matrix A.
Create a module, Matrix C, as the output matrix.
Configure Matrix C with one line item as Pages, the list I as Rows, and the lists J and K as Columns.
In the Matrix C module, hide every occurrence of the K list except the parent column, which sums intermediate products.
In the line item used as Pages in Matrix C, use this formula:

Matrix A.Value * Matrix B.Value

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