I found the solution!
For those who are interest:
--------------------------
<div id="div1">Content 1 here</div>
<div id="div2">Content 2 here</div>
<div style='clear:both;'></div>
<style>
#div1{float:left; height:auto; min-height:200px; width:calc(100%-220px);}
#div2{float:left; height:auto; min-height:200px; width:200px;}
</style>
Check now , int the above link how smoothly it works!
Much better than the media queries (i use it know for only one situation, below 500px width)