#include <iostream>
using ll = long long;
constexpr ll mod = 1000000007;
int main() {
  ll a, b;
  std::cin >> a >> b;
  a %= mod;
  b %= mod;

  ll aq = a / 2;

  ll y = (aq * 4) % mod;
  y += 2; if(y > mod) y -= mod;

  if(a % 2) ++aq;

  ll x = (aq * 4) % mod;

  ll bq = b / 2;

  ll n = x + y; if(n > mod) n -= mod;

  n *= bq; n %= mod;
  
  if(b % 2) {
    n += x;
    if(n > mod) n -= mod;
  }
  n += (a / 2) * 2; n %= mod;
  if(++n == mod) n = 0;
  std::cout << n << '\n';
}