import java.io.*;
import java.util.*;

class Main
{
    public static void main(String args[])throws Exception
    {
        BufferedReader bu=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb=new StringBuilder();
        String s[]=bu.readLine().split(" ");
        long a=Long.parseLong(s[0]),b=Long.parseLong(s[1]);
        long M=(int)1e9+7,x=a%M,y=b%M,ans=(x*2+1)*(y*2+1)%M;
        if(a%2==b%2) ans=(ans+1)*power(2,M-2,M)%M;
        else ans=(ans-1)*power(2,M-2,M)%M;
        System.out.println(ans);
    }

    static long power(long a,long b,long M)
    {
        long res=1;
        while(b!=0)
        {
            if(b%2==1) res=res*a%M;
            b>>=1;
            a=a*a%M;
        }
        return res;
    }
}