/ol>
<div style="margin-top:25px;clear:both;">
<style>
.metanit-rect { width: 300px; height: 250px; }
@media(min-width: 500px) { .metanit-rect { width: 336px; height: 280px; } }
@media(min-width: 760px) { .metanit-rect { width: 728px; height: 90px;  } }
@media(min-width: 1000px) { .metanit-rect { width: 336px; height: 280px;  } }
@media(min-width: 1122px) { .metanit-rect{ width: 728px; height: 90px;} }
@media(min-width: 1400px) { .metanit-rect{ width: 970px; height: 90px;} }
</style>
<!-- metanit_rect -->
<