div{
background:red;
height:300px;
width:300px;
border:10px solid blue;
margin:50px 10px;
padding:30px;

}
.Hoja1{
  background:yellow;
  text-align:center;
  line-height:150px;
}
.Hoja2{
  height:150px;
  width:150px;
}

.Hoja3{
  background:green;
  float:right;
}