#include<cstdio>
#define MOD 1000000007
int main(void){
	long long int B, C, D, i, x;
	scanf("%lld%lld%lld", &B, &C, &D);
	B = B % MOD;
	C = C % MOD;
	D = D % MOD;
	x = 0;
		for (i = 0; i < D; i++) {
			x = ((x + B)%MOD)*C %MOD;
		}
	printf("%lld", x);
	return 0;
}