If f(x+y)=f(x)f(y)f(x+y) = f(x)f(y)f(x+y)=f(x)f(y) for all x,y∈Rx, y \in \mathbb{R}x,y∈R and f(1)=3f(1) = 3f(1)=3, find the value of f(3)f(3)f(3).
999
272727
666
121212