Tryit Editor v1.8

Source Code:
<!DOCTYPE html>
<html>
<head>
<style> 
.container
{
width:300px;
border:1px dotted black;

/* Firefox */
display:-moz-box;
-moz-box-orient:horizontal;
-moz-box-lines:multiple;

/* Safari and Chrome */
display:-webkit-box;
-webkit-box-orient:horizontal;
-webkit-box-lines:multiple;

/* W3C */
display:box;
box-orient:horizontal;
box-lines:multiple;
}

.box
{
width:100px;

/* Firefox */
-moz-box-flex: 1.0;

/* Safari and Chrome */
-webkit-box-flex: 1.0;

/* W3C */
box-flex: 1.0;
}
</style>
</head>
<body>

<div class="container">
  <div class="box">11111111111</div>
  <div class="box">22222222222</div>
  <div class="box">33333333333</div>
  <div class="box">44444444444</div>
</div>

<p><b>Note:</b> None of the major browsers support the box-lines property.</p>

</body>
</html>
Result:
W3Schools.com - Try it yourself