Idrissa is painting the walls of his living room. He uses 2/3 of a can of paint, and this is only enough to
cover 1/6 of the surface of his walls.Exactly how much paint does Idrissa need to cover the entire surface
of his walls?
To cover 1/6 of the surface of his walls, Idrissa used 2/3 of a can of paint.
To cover the entire surface of his walls, he would need 6 times more paint.
Therefore, Idrissa would need (2/3) * 6 = 4 cans of paint to cover the entire surface of his walls. Answer: \boxed{4}.