div#calculadora{
	background-color: skyblue;
	text-align: center;
	display: inline-table;
    overflow: hidden;
    position: relative;
    margin: 0% 0% 0% 20%;
}
div.line{
	display: inline-grid;
	margin-left: 20px;
	margin-right: 15px;
}
input{
	text-align: left;
	vertical-align: middle;
	position: relative;
}
.number{
	width: 45px;
	height: 45px;
	margin: 5px 5px 0px 0px;
}
.operation{
	width: 45px;
	height: 45px;
	margin: 5px 5px 0px 0px;
}
.function{
	width: 100px;
	height: 45px;
	margin: 5px 5px 0px 0px;
}