#include <bits/stdc++.h>
using namespace std;
int n, m, s, C[1001][2001];
int main() {
  for (int i = 0; i <= 1000; i++) {
    C[i][0] = C[i][i] = 1;
    for (int j = 1; j < i; j++)
      C[i][j] = (C[i - 1][j - 1] + C[i - 1][j]) % 1000000007;
  }
  scanf("%d%d%d", &n, &m, &s);
  printf("%d\n", int(C[n - 1][2 * s] * 1ll * C[m - 1][2 * s] % 1000000007));
}
