public RtTuple Multiply(RtTuple tuple)
        {
            var result      = new double[RowCount];
            var tupleValues = tuple.AsArray();

            for (var row = 0; row < this.RowCount; row++)
            {
                double rowValue = 0;
                for (var col = 0; col < this.ColCount; col++)
                {
                    rowValue += Get(row, col) * tupleValues[col];
                }

                result[row] = rowValue;
            }

            return(new RtTuple(result[0], result[1], result[2], result[3]));
        }