Provide a real world example of how pressure and surface area are related?

A real world example on the relationship between pressure and surface area can be seen in the functioning of a syringe and the needle

The surface area of the barrel is larger than the surface area of the shaft of the needle and as such when the plunger of a syringe containing sufficient quantity of fluid such as water is pressed, the water coming out of the needle rises to a very high level while the plunger moves a distance of a fraction of the barrel length indicating that the pressure of the water coming out from the syringe is much higher than the pressure on the water in the barrel of the syringe

Explanation:

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas