It is now like this:
I want like this:
my css:
.maindiv{
    width:410px;
}
.innerdiv{
    display: inline-block;
    width: 200px;
    height: auto;
}
this is an example page
It is now like this:
I want like this:
my css:
.maindiv{
    width:410px;
}
.innerdiv{
    display: inline-block;
    width: 200px;
    height: auto;
}
this is an example page
 
    
    Here's an easy implementation ,just use display:flex on main div and make two columns div to wrap inner div
<div class="maindiv">
    <div class="col-1">
        <div class="innerdiv">
           <img style="width: 100%; height: 200px;"/>
        </div>
        <div class="innerdiv">
            <img style="width: 100%; height: 120px;"/>
         </div>      
         <div class="innerdiv">
             <img style="width: 100%; height: 220px;"/>
         </div>
     </div>
     <div class="col-1">
        <div class="innerdiv">
            <img style="width: 100%; height: 260px;"/>
         </div>
         <div class="innerdiv">
              <img style="width: 100%; height: 180px;"/>
         </div>
       </div>
</div>
css
.maindiv {
width: 410px;
display: flex;
}
Result
