def growth(a,b,t):
    k=int((0.5*a)+(0.5*b))
    x=pow(k,t,((10**9)+7))
    print x
          



n = map(int,raw_input().strip().split())
a_ = n[0]
b_ = n[1]
t_ = n[2]
growth(a_,b_,t_)