Why are there no 4-winged airplanes?
With larger wings comes more drag. True, because the drag is a function of the wing area A:
$$ D = C_D \cdot \frac {1}{2} \rho \cdot V^2 \cdot A $$
You need a certain wing area to support the weight of the aircraft. Now the question is: over how many wings will we distribute this wing area? For over 80 years, the answer has been: one wing (the two wing halves make up one wing).
The classical biplane is a thing of the past, however there have been incredibly clever aircraft builders who have looked at the long coupled canard configuration. This one really makes a lot of sense:
 Image source
So to answer your question: there are aircraft with two wings. It's just that people don't buy them, and go for boring old Cessna's instead.