function greatestProduct(matrix) {  let product = 0;  const numberOfRows = matrix.length;  const numberOfCols = matrix[0].length;  for (let i = 0; i < numberOfRows; i++) {    let row = matrix[i];    for (let e = 0; e < numberOfCols - 3; e++) {      let rowProduct = row[e] * row[e + 1] * row[e + 2] * row[e + 3];      if (rowProduct > product) {        product = rowProduct;      }    }  }  for (let i = 0; i < numberOfCols; i++) {    for (let e = 0; e < numberOfRows - 3; e++) {      let columProduct = matrix[e][i] * matrix[e + 1][i] * matrix[e + 2][i] * matrix[e + 3][i];      if (columProduct > product) {        product = columProduct;      }    }  }  return product;}