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Kuromasu (Product) (1018)
Instruction:
Shade some uncircled cells so that all remaining cells are connected orthogonally and no two black cells share an edge.
Cells with circles must not be shaded.
Each numbered cell indicates the count of unshaded cells connected in line vertically to the numbered cell including the cell itself, multiplied by the count of unshaded cells connected in line horizontally to the numbered cell (also including the cell itself).