Cant get if sentence to work?

I am using a foreach loop to run through an array. With it I have $q which iterates with a value of 1 on every loop run. And when the value reaches 1/3 of the total, it is to echo out new div, in order to make several columns. But I cant seem to find the error.

            $i = 0;
            $count = count($segments->getItems());
            $countdiv = $count / 3;
            $countdiv = number_format((float)$countdiv,0,',','');
            $q = 0;
                foreach($segments->getItems() as $segment) 
                {
                    $q++;
                    $allusers = 0;
                    if($segment->getName() === 'All Users') {
                        $allusers = "checked";
                    }

                    ?>
                    <label class="custom-control custom-checkbox">
                        <input type="checkbox" name="<?php echo $segment->getName();?>" value="segments[]" class="custom-control-input" <?php echo $allusers?>>
                        <span class="custom-control-indicator"></span>
                        <span class="custom-control-description"><?php echo $segment->getName();?></span>
                      </label>
                    <?php
                    if($q === $countdiv) 
                    {
                        ?>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="custom-controls-stacked">
                            <?php
                    }
                 }