Get stuck of Basic Data Structures: Iterate Through All an Array's Items Using For Loops

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I did not understand what was required of the challenge. Could you explain and simplify for me?

function filteredArray(arr, elem) {
let newArr = [];
// Only change code below this line

// Only change code above this line
return newArr;

console.log(filteredArray([[3, 2, 3], [1, 6, 3], [3, 13, 26], [19, 3, 9]], 3));

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Challenge: Iterate Through All an Array’s Items Using For Loops

Link to the challenge:

your function has two parameters, one is an array of arrays, the other a number

you need to remove the subarrays containing the number and then return the arrary without those