button {
  background:red;
  font-size:20px;
  color:white;
  border:0;
  cursor:pointer;
}

.box {
  font-size:50px;
  border:10px solid black;
  width:200px;
  font-size:80px;
  line-height:100px;
  height:100px;
  display:inline-block;
  vertical-align:top;
  text-align:center;
  margin:5px;
  overflow:hidden;
}