How to adjust one div into another in html/css

[ADQUSIT]

Hi. I took a div the main_div and inside this div i have others i.e. Menus_div and content_div. Inside the content div i want to take another div for news section means (div into div). The problem I'm facing is that when i create the div into content_div so it does not get adjusted into content_div. I want to place the new_div into right side of the content div.

In this image, created the news_div separately, inside the main_div but that's not what i want. I just want to put it inside the content_div.

This is my code for html:

<div id="main_div">


<!-- Header1_div Starts -->
<div id="Header1_div">
<h3 align="center" style="padding-top:40px">This is Header</h3>

</div>
<!-- Header1_div Ends -->


<!-- Menus_div Starts -->
<div id="Menus_div">
<ul>
<li><a href="index.html">HOME </a></li>
<li><a href="contact.html">CONTACT US</a></li>
<li><a href="products.html">PRODUCTS</a></li>
<li><a href="about_us.html">ABOUT US</a></li>
</div>

<!-- Menus_div Ends -->

<!-- body_div Starts -->
<div id="body_div">

<h3 align="center" style=" padding-top:150px;">
This is Home Page with body div.
</h3>
</div>
<!-- body_div Ends -->


<!-- News_div Starts -->
<div id="news_div">
<marquee scrollamount="3" direction="up"><h3 align="center"> Hello </h3></marquee>
</div>
<!-- News_div Ends -->



<!-- footer_div Starts -->
<div id="footer_div">

<h3 align="center" style="padding-top: 20px;"> This is Footer Division </h3>
</div>
<!-- footer_div Ends -->

</div>

and this is css code:

#main_div
{
    background-color:#3CF;
    height: 600px;
    width: 1000px;
    margin: 0px auto;
}




#news_div
{
    background-color:#999999;
    height: 70%;
    width: 200px;
    float:left;
}

[tr333]

Sounds like you want to use the flexbox layout. The guide at CSS Tricks shows an example matching your image above. Three columns with a header and footer.

[ramarjun]

create the container
and make div's are inside the container give width and height of each div whatever if u want mention all div float left its going to be show your requirement you will not get clear understand this take some reference website for solve this