'use strict';
// paste your freeCodeCamp solutions in here
function multiplyAll(arr) {
    var product = 1;
    // Only change code below this line
    for (var i = 0; i < arr.length; i++){
      for (var j=0; j < arr[i].length; j++){
        console.log([j]);
        product = product * arr[i][j];
      }
    }
    // Only change code above this line
    return product;
  }
  
  // Modify values below to test your code
  multiplyAll([[1,2],[3,4],[5,6,7]]);