.h1 {
    text-align: center;
    position: relative;
    color: #fff;    
    margin: 0 -30px 30px -30px;
    padding: 10px 0; 
    text-shadow: 0 1px rgba(0,0,0,.8);
    background-color: #5c5c5c;
    background-image:  linear-gradient(rgba(255,255,255,.3), rgba(255,255,255,0));
    -moz-box-shadow: 0 2px 0 rgba(0,0,0,.3);
    -webkit-box-shadow: 0 2px 0 rgba(0,0,0,.3);
    box-shadow: 0 2px 0 rgba(0,0,0,.3);
    font-size: x-large;
}
.h1:before, 
.h1:after {
    content: '';
    position: absolute;
    border-style: solid;
    border-color: transparent;
    bottom: -10px;
}
.h1:before {
    border-width: 0 10px 10px 0;
    border-right-color: #222;
    left: 0;
}
.h1:after {
    border-width: 0 0 10px 10px;
    border-left-color: #222;
    right: 0;
}
body {
	font-family:'Indie Flower',cursive;
  background-color: #dadada;
}
#contenedor1{
  	margin: 0 30px;
  	border: 1px solid grey;
  	padding: 20px;
  	border-radius: 3px;
  	background-color: #FFF;
  	width: 624px;
    height: 359px;
}
.operador{
    border: 1px solid #dedede;
    border-radius: 3px;
    color: whitesmoke;
    display: inline-block;
    padding: 8px 11px;
    background-color: #5c5c5c;
    width: 120px;
    height: 42px;
}
.num{
    width: 615px;    
}