JSFiddle - React, Tailwind, and code Playground

HTML

Output:
<div id="output"></div>

JavaScript

$(document).ready(function(){
    var cubes =   [[1, 2, 3],[4, 5, 6],[7, 8, 9]];
    var output = "";
    
    for(var a = 0; a < cubes[0].length; a++)
    for(var b = 0; b < cubes[1].length; b++)
    for(var c = 0; c < cubes[2].length; c++) {
        output = output + [cubes[0][a],cubes[1][b],cubes[2][c]] + ",<br />";
    }
    
    $('#output').html(output);
});