#mainContent p {
font-family: Georgia, serif;
font-size: 0.9em;
line-height: 1.4em;
color: #000;
margin: 1ex 0;
}
I've met this code in a project. When I got to check this on devtool of Chrome I found that margin: 1ex 0
gives the following, margin-top: 6.9328px
margin-bottom: 6.9328px
margin-right: 0
margin-left: 0
My question is, what equation was used to get 1ex to equal 6.9328px
?