#include <bits/stdc++.h>
using namespace std;
vector<long long> fact;
long long power(long long x, long long y) {
  long long res = 1;
  x = x % 1000000007;
  while (y > 0) {
    if (y & 1) res = (res * x) % 1000000007;
    y = y >> 1;
    x = (x * x) % 1000000007;
  }
  return res;
}
long long modInverse(long long n) { return power(n, 1000000007 - 2); }
long long nck(long long n, long long k) {
  if (k == 0) return 1;
  long long ans = (fact[n] * modInverse(fact[k])) % 1000000007;
  ans = (ans * modInverse(fact[n - k])) % 1000000007;
  return ans;
}
void solve() {
  long long n, m, k;
  cin >> n >> m >> k;
  if (n < m) swap(n, m);
  fact = vector<long long>(n + 1, 1);
  for (long long i = 2; i <= n; i++) {
    fact[i] = (fact[i - 1] * i) % 1000000007;
  }
  if (2 * k > m - 1) {
    cout << 0 << '\n';
    return;
  }
  long long ans =
      (nck(n - 1, 2 * k) * nck(m - 1, 2 * k) + 1000000007) % 1000000007;
  cout << ans << '\n';
  return;
}
int main() {
  solve();
  return 0;
}
