Core code:
var paddleft = $(".teacher- title").css("padding-left").replace(/[^0-9]/ig, "");
var num=parseInt(paddleft);
Demo Code:
If you need to introduce external Js, you need to refresh to execute ]<script>
var paddleft = $(".teacher-title").css("padding-left").replace(/[^0-9]/ig, "");
var num=parseInt(paddleft);
alert(num);
</script>