Am I missing info for this Ideal Gas Equation?

Question descriptionSo, this is the balanced equation given

N₂ + 3H₂ => 2NH₃

And we know that N₂ is 28.0134g/mol

Given that there are 3L of NH₃, how many Liters of N₂ are needed?

PV=nRT (equation to be used)

P=1.0526atm

T=291.15K

R=0.08206 Latm/molK

V= 3L of NH₃

V=?L of N₂

What is ‘n’ and how do I find it? And then how do I find the Volume for the amount of N₂ needed to create 3L of NH₃?