How to remove extra iteration in Smarty loop?

Question

Smarty

Good day to all. The crux of the matter is as follows. There is an array and I bypass it in a foreach loop.
To add tr I use " is div by ".

{foreach key=key name=goods_name item=c from=$goods}
<tr>
  <td>{$c.name}</td>
  {if $smarty.foreach.goods_name.iteration is div by 4}
    </tr><tr>
  {/if}
</tr>
{/foreach}

The array has 20 elements. It should output 5 lines. And as a result, an empty string is created at the end without td. Why? And how to remove it?