# Enter your code here. Read input from STDIN. Print output to STDOUT
a,b,t = raw_input().split()
a,b,t = int(a),int(b),int(t)
n = (a+b)/2
def Pow(a,n):
    res = 1;
    while n:  
        if n%2 == 1: 
            res = res * a
            n -= 1
        else:
            a = a*a
            n = n/2
        if a>10**9+7:
            a = a%(10**9+7)

    return res%(10**9+7)
        
def myPow( x, n):
    if n == 0:
        return 1
    if n == 1:
        return x
    if n == -1:
        return 1/x
    if n==2:
        return x*x
    if n == -2:
        return 1/(x*x)
    if n>0:
        if n%2 == 0:
            return myPow(x,n/2)**2
        else:
            return myPow(x,(n-1)/2)**2*x
    else:
        if n%2 == 0:
            return myPow(x,n/2)**2
        else:
            return myPow(x,(n-1)/2)**2*x

print Pow(n,t)%(10**9+7)