# Enter your code here. Read input from STDIN. Print output to STDOUT
s=map(int, raw_input().split())
a=s[0]
b=s[1]
t=s[2]


v=1
f=(a+b)/2
s="{0:b}".format(t)
for i in s[::-1]:
    if i == '1':
        v*=f
        v=v%1000000007
    f=(f*f)%1000000007


print(v)