Search for the following line of code:
<div class='post-body entry-content'>
If you haven't found above code, search for the following:
<div class='post-body'>
Got it? ok. Now you can add the widget (ads) code just below the above code. See the below example:
<div class='post-body entry-content'>
You ads Code Goes Here....
OR
<div class='post-body'>
You ads Code Goes Here....
Replace the red colored text with your ad or widget code. If you get some problem like the ads or widget are show in home page also, you have to put some line of the code to show the widget in only one post page ( inside the page).
Replace the code which you have found above with:
<div class='post-body entry-content'>
<b:if cond='data:blog.pageType == "item"'>
<div style='float:left; margin-right:15px;'>
You ads Code Goes Here....(first ad)
</div>
</b:if>
OR
<div class='post-body'>
<b:if cond='data:blog.pageType == "item"'>
<div style='float:left; margin-right:15px;'>
You ads Code Goes Here....(first ad)
</div>
</b:if>
Now, you will see your ads or widget are only inside the page. But don't forget to replace red text with your code.
Placement for second ad
The above one is first ad (left in position) . Now you can put second ad (Right in position). See the following example for details:
<div class='post-body entry-content'>
<b:if cond='data:blog.pageType == "item"'>
<div style='float:right; margin-left:23px;'>
You ads Code Goes Here....(second ad)
</div>
</b:if>
Or
<div class='post-body'>
<b:if cond='data:blog.pageType == "item"'>
<div style='float:right; margin-left:23px;'>
You ads Code Goes Here....(second ad)
</div>
</b:if>
It may not work if you copy the ad code directly form adsense. You have to encode that html ads code. Do the following:
Copy & paste your ad code to following form and click Convert. Then copy the code after converting it & replace red text with the code which you have converted.