[jsNubster]

<script>
let number = [
  [8],
  [2, 4],
  [1, 3, 5],
  [2, 6],
  [1, 5, 7],
  [2, 4, 6, 8],
  [3, 5, 9],
  [4, 8],
  [0, 5, 7, 9],
  [6, 8]
];

let finalNumber = [];

let result = prompt('Введите пин код', 1234);
let devResult = [];
for (let i = 0; i < result.length; i++) {
    devResult[i] = result[i];
}


for (let i = 0; i < devResult.length; i++) {
    let a = devResult[i];
    finalNumber[i] = [];

        for(g = 0; g < number[a].length; g++){
            finalNumber[i][g] = number[a][g];



        }


}


function combinator(matrix){
  return matrix.reduceRight(function(combination, x){
    var result = [];
    x.forEach(function(a){
      combination.forEach(function(b){
        result.push( [ a ].concat( b ) );
      });
    });
    return result;
  });
};


document.write(
  combinator( finalNumber ).join("<br>")
);



  </script>

Это было слишком просто, я думал, так нельзя.