#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>
#define LP pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define all(s) s.begin(), s.end()
#define rall(s) s.rbegin(), s.rend()
template<class T>
void chmax(T& a, T b) { a = max(a, b); };
template<class T>
void chmin(T& a, T b) { a = min(a, b); };

using mint = modint1000000007;

int main() {
  ll a, b;
  cin >> a >> b;
  mint e1 = 2*(a/2)+1, o1 = 2*a+1-e1;
  mint e2 = 2*(b/2)+1, o2 = 2*b+1-e2;
  mint ans = o1*o2+e1*e2;
  cout << ans.val() << endl;


  return 0;
}