Cyclohexane is represented as with an hexagonal shape.
1,2 dimethyl means that one CH3- group is attached to the carbon number one of the ring, and other CH3CH2- group is attached to the carbon number two.
4-ethyl means that one CH3CH2- group is attached to the carbon number four of the ring.
So, following IUPAC nomeclature rules, your product should look like:
You can see this representation if the figure attached.