HELP **Nesting for Loops Problem** HELP

I need help debugging my code. Its passing multiplyAll([1], [2], [3]);
but not multiplyAll([[1,2],[3,4],[5,6,7]]);
Maybe I just need another pair of eyes to review what I have.
Anybody see anything wrong?

Your code so far

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[1].length; j++){
  product *= arr[i][j];
// Only change code above this line
return product;


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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36.

Challenge: Nesting For Loops

Link to the challenge:

You’re almost there, you only have one little mistake (one wrong character) in this line:

for (var j = 0; j < arr[1].length; j++){

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