#include <bits/stdc++.h>
#define rep(i, l, r) for (int i = (l); i < (r); i++)
using namespace std;

typedef long long ll;

int main() {
    ll A, B, MOD = 1000000007;
    cin >> A >> B;
        if (A % 2 == B % 2) {
            A %= MOD;
            B %= MOD;
            cout << ((A + 1) * (B + 1) + A * B) % MOD << endl;
        } else {
            A %= MOD;
            B %= MOD;
            cout << (A * (B + 1) + (A + 1) * B) % MOD << endl;
        }
}