I know how to use `ngFor` to create multiple element. 

```
// component's data
items = [
    {'name': 'Item 1'},
    {'name': 'Item 2'},
    {'name': 'Item 3'},
    {'name': 'Item 4'},
    {'name': 'Item 5'},
    {'name': 'Item 6'},
];
....
<div class="row" *ngFor="let item of items">
  <div class="col">
    <label><input type="radio">{{item.name}}</label>
  </div>
</div>
....

```

But today I want to create each 3 elements for a group with angular2.

```
....
<div class="row">
  <div class="col">
    <label><input type="radio">Item 1</label>
  </div>
  <div class="col">
    <label><input type="radio">Item 2</label>
  </div>
  <div class="col">
    <label><input type="radio">Item 3</label>
  </div>
</div>
<div class="row">
  <div class="col">
    <label><input type="radio">Item 4</label>
  </div>
  <div class="col">
    <label><input type="radio">Item 5</label>
  </div>
  <div class="col">
    <label><input type="radio">Item 6</label>
  </div>
</div>
....

```

I don't want to modify my array structure. How can do it? Can I move out `ngFor` element? Thanks your help.