How can we use that for our example? [Force Multipliers]

We can create s small area tube with a piston. We have another piston on the other side which will be lifted from the water. How? We put a force in to create pressure. Water has to spread it out, and will push against the second piston for a bigger force. More Pressure = More force. If you had to find out force it would be: Force [N] = Pressure [Pa] x Area [m²]