<div id="ct">
  <p> Lorem ipsum dolor sit amet, cons ectetur adipisicing elit. </p>
  <p> Lorem ipsum dolor sit amet, cons ectetur adipisicing elit. </p>
  <p> Lorem ipsum dolor sit amet, cons ectetur adipisicing elit. </p>
  <div id="droite">Lorem ipsum dolor sit amet, consectetur adipisicing elit.</div>
</div>

#ct{
  width: 300px;
  height: 200px;
  border: thin solid red ;
  position : relative;
}
#droite{
  background-color: orange;
  border: thin solid blue ;
  position: absolute;
  width: 100px;
  margin: 10px;
  bottom: 0;
  right: 0;
}