let euler11 =
    let numGrid = ProblemData.Euler11NumberGrid // a 20x20 Array2D
    let dimensionLengths = Array2D.length1 numGrid
    let highestProd = ref 0
    Array2D.iteri (fun x y elem ->
        if (findBestProductFromPoint x y numGrid) > !highestProd then
            highestProd := (findBestProductFromPoint x y numGrid)) numGrid
    !highestProd