<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>Fixed layout border-box</title>
    <style>
      body {
        width: 90%;
        max-width: 900px;
        margin: 0 auto;
      }

      div:nth-of-type(1) {
        width: 36%;
        float: left;
      }

      div:nth-of-type(2) {
        width: 30%;
        float: left;
        margin-left: 4%;
      }

      div:nth-of-type(3) {
        width: 26%;
        flo