table{width:90%;max-width:1700px;margin-left:10px;margin-top:10px;border-collapse:collapse}table,th,td{border:1px solid #ddd;max-width:370px}th,td{padding:8px;text-align:left}th{background-color:#f2f2f2;text-align:center}.calcbtn{margin:10px 20px}