/*
Calculating from width 310px
Grid 4 columns at 70px, gutter 10px

gutter = 10px | 3.2258%
1 = 70px | 22.558%
2 = 150px | 48.387%
3 = 230px | 74.1935%
4 = 310px | 100%

*/

.gallery {
	overflow: hidden;
	clear: both;
}

.gallery li {
	float: left;
	width: 48.387%;
	margin: 0 0 3.2258% 3.2258%;
}

.gallery li:nth-child(2n+1) {
	margin-left: 0;
}