Fields don't format HTML-tags on Front-end

My freinds,

I’m research in Rasite CSS and can’t find how to show correct HTML-tags in front-end for fields like Product Description or Product additional fields.

for example:

Code:

<div>
<ul>
<li> G10 Frames</li>
<li> LT (modified 50 sized head)</li>
<li> Length: 1366mm</li>

<li> Height: 381mm</li>
<li> Width: 260mm</li>
<li> Main Rotor Diameter: 1435mm</li>
<li> Tail Rotor Diameter: 262mm</li>
<li> Main Rotor Blades: 600mm-660mm</li>
<li> Tail Rotor Blades: 95mm</li>
<li> Flight Time: More than 30 Minutes with consumption of 300ml</li>
<li> Weight complete with electronics and engine (no fuel): 4500g</li>
</ul>

do show without HTML format. Like this:

Code:

G10 Frames
 LT (modified 50 sized head)
 Length: 1366mm
 Height: 381mm
 Width: 260mm
 Main Rotor Diameter: 1435mm
 Tail Rotor Diameter: 262mm
 Main Rotor Blades: 600mm-660mm
 Tail Rotor Blades: 95mm
 Flight Time: More than 30 Minutes with consumption of 300ml
 Weight complete with electronics and engine (no fuel): 4500g

Any suggest, please?

Thanks