#include <bits/stdc++.h>
long long W[1005][1005], N, M, K, X = 1000000007, i, j, s;
int main() {
  for (i = 1; i < 1001; i++) W[i][0] = 1;
  for (j = 1; j < 1001; j++) {
    s = 0;
    for (i = 3; i < 1001; i++) {
      s = (s + W[i - 2][j - 1]) % X;
      W[i][j] = (W[i - 1][j] + s) % X;
    }
  }
  std::cin >> N >> M >> K;
  std::cout << (W[N][K] * W[M][K]) % X;
}
