Zemanta custom css help

Hello!
I am in need of some help. I am currently using the plugin “Zemanta” and I was fiddling around with the custom css (I wanted the images circular) which I was able to obtain. However, one thing I am having issues with is putting them in a straight line horizontally instead of vertically. Any ideas?

currently I have this for the css; I just need help with putting them into a straight line

.related_post_title {
}
ul.related_post li img {
border-radius: 100px; !important
}ul.related_post li img {
border-radius: 100px; !important
}ul.related_post li img {
border-radius: 100px; !important
}ul.related_post li img {
border-radius: 100px; !important
}