A basic hydraulic system with two unequal sized syringes can multiply force through the principle of Pascal's law, which states that pressure exerted on a fluid is transmitted equally in all directions. When force is applied to the smaller syringe, it creates pressure on the fluid which is then transmitted to the larger syringe, causing the larger piston to move with a greater force. This allows the user to multiply their force and apply greater pressure than they would be able to do without the hydraulic system. Essentially, the force is being transferred and amplified through the fluid.