#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

unsigned long long powermod(unsigned long long base, unsigned long long exponent, unsigned long long modulus) {
    unsigned long long result = 1;
    while (exponent > 0) {
       if ((exponent % 2)) {
           result = (result * base) % modulus;
       }
       base = (base * base) % modulus;
       //exponent = floor(exponent / 2);
        exponent = exponent / 2;
    }
    return result;
}

int main() {
    int a, b;
    unsigned long long c;
    scanf("%d %d %lld\n", &a, &b, &c);
    unsigned long long factor = (unsigned long long)(a+b)/2;
    unsigned long long cells = powermod(factor, c, 1000000007);
    printf("%lld", cells);
    return 0;
}