The SI unit of pressure is pascal and it is equal to the pressure exerted by

We know that Pressure $=\mathrm{Force}/\mathrm{Area}$$=m.a/A$

that is $\mathrm{m}=10.2\mathrm{g}$ and $\mathrm{A}=1.00{\mathrm{cm}}^2$.

It means pressure exerted by 1 pascal is  a mass of $10.2\mathrm{mg}$ on $1.00{ \mathrm{cm}}^2$ area.