Image size to fit in fixed size div
<p>I have <code>div</code> of fixed size <code>height:45px</code> and <code>width:60px</code> and no other <strong>css</strong> to <code>div</code>. This <code>div</code> used to show the image uploaded by customer. I want to give the dimensions of image so that the uploaded image will be fit in given div perfectly. I need to give the optimized size so that image will look good in div. First logic I tried to give the image with 45 by 60, 90 by 120 like. 
What is the correct way to solve this.Please guide.Thanks in advance.</p>