What is the force that should be applied so that the system of simple mechanisms is in equilibrium

What is the force that should be applied so that the system of simple mechanisms is in equilibrium if the weight of the suspended sinker is 800 g?

Two movable blocks give a double strength gain each. We know that:
m = 0.8 kg.
To solve the problem, write down a formula of the following type:
F = m * g / 4;
Let’s substitute:
F = 0.8 * 10/4;
F = 2 H.
Answer: The force will have to be equal to 2 N, then the mechanism will work in balance.