#calculadora{border-top:1px dashed silver;border-left:1px solid silver;border-right:1px solid silver;font:11px courier new;min-height:15px;background:#fff;box-shadow:2px -2px 2px #eaeaea}#calculadora ul{list-style:none}#calculadora li{overflow:hidden}#calculadora li .op{float:right;width:10px}#calculadora li .num{margin-right:15px;text-align:right}#calculadora li.tot{margin-bottom:3px;border-bottom:1px dashed silver;padding-bottom:3px;font-weight:bold}