body {
  background: #f4f4f4;
}

#principal {
  width: 920px;
  /* border: 1px solid red; */
}

.noticia {
  background: #e5e5e5;
  padding: 5px;
  width: 280px;
  margin: 7px;
  float: left;
}

.clear {
  clear: both;
}

.imagem-galeria {
  background: white;
  width: 265px;
  padding: 5px;
  float: left;
  margin: 15px;
}