I have float red divs on blue div like on picture
<div class="blue">
<div style="height: 40px; float: left"></div>
<div style="height: 40px; float: left"></div>
<div style="height: 40px; float: left"></div>
<div style="height: 40px; float: left"></div>
<div style="height: 40px; float: left"></div>
<div style="height: 40px; float: left"></div>
</div>
I want to do, so blue div have height on red DIVs. When I remove float it's OK.