Zarovnání dvou divů uvnitř třetího

<div class="product_box">
  <div class="product_right">
    <a class="obrazek_produktu" href="#" title="Produkt"><img src="img/product_img.png" alt="produkt" /></a>
    <a class="obrazek_produktu" href="#" title="Produkt"><img src="img/product_img.png" alt="produkt" /></a>
  </div>
  <div class="product_left">
    <h4>Název produktu</h4>
      <p>Lorem Ipsum is simply dummy text of the printing
and typesetting industry. Lorem Ipsum has been the
industry's standard dummy text.</p>
      <p>19 900 Kč</p>
    <a href="#" title="Koupit"></a>
  </div>
</div>

.product_box {float:left;
  width:851px;
  height:197px;
  border:solid 3px #dcdcdc;
}

.product_left {float:left;}
.product_right {float:right;}