def power(x,y):
    if y == 0: 
        return 1
    temp = power(x, y/2)
    if y%2 == 0:
        return temp*temp%1000000007 
    else: 
        return (x*temp*temp)%1000000007
            
a = map(int, raw_input().split())
print (power(((a[0]+a[1])/2),a[2]))%1000000007