In a deep-sea robotic research probe, a hydraulic actuator is used to seal a sample chamber. To activate the seal, a force of 18.9 N is applied normal to the surface of the cylinder's piston. The pressure transmitted through the hydraulic fluid is 135 000 Pa135\,000\text{ Pa}135000 Pa.
Calculate the surface area of the piston. Give your answer in standard form and include the correct SI unit.