#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001
 
 
int main(){
	
	long long A,B;
	cin>>A>>B;
	
	long long a = A*2+1;
	long long b = B*2+1;
	
	mint ans = 0;
	
	if(B%2==1){
		mint temp = a/2+1;
		temp *= (b+1)/2;
		ans += temp;
		
		temp = a/2;
		temp *= (b)/2;
		ans += temp;
		
	}
	else{
		mint temp = a/2;
		temp *= (b+1)/2;
		ans += temp;
		
		temp = a/2+1;
		temp *= (b)/2;
		ans += temp;
		
	}
	
	cout<<ans.val()<<endl;
	
	return 0;
}