div { width: calc(100% / 4); }
div { margin-top: calc(-120% - 4px); }
div {
	height: -webkit-calc(9/16 * 100%)!important;
	width: -moz-calc((50px - 50%)*2);
}
div { width: calc(50% - ( ( 4% ) * 0.5 ) ); }
