Considering the fluid as ideal, the pressure will spread throughout its volume. Thus,
[tex] \frac{F_1}{A_1}= \frac{F_2}{A_2} \\ F_2= \frac{3\times 500}{0.5} \\ \boxed {F_2=3000N}[/tex]
If you notice any mistake in my english, please let me know, because my english level is still low.