#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
void power(long double x, long y)
{
    long res = 1;      // Initialize result
    long p = 1000000000 + 7;
    //x = x % p;  // Update x if it is more than or 
                // equal to p
 
    while (y > 0)
    {
        // If y is odd, multiply x with result
        if (y % 2 != 0)
            res = ((long)(res*x)) % p;
 
        // y must be even now
        y = y/2; // y = y/2
        x = ((long)(x*x)) % p;  
    } 
    printf("%ld", res);
}
  
int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    int a,b;
    long t;
    scanf("%d %d %ld",&a,&b,&t);
    long double x = (0.5 * a) + (0.5 * b);
    power(x,t);
    return 0;
}