# -*- coding: utf-8 -*-
"""
Created on Sun Aug  1 14:11:40 2021

@author: sumitacchan
"""

A, B = map(int, input().split())
mod = 10**9 + 7

assert(0 <= A and A <= 10**18)
assert(0 <= B and B <= 10**18)

if A % 2 == B % 2:
    ans = ((2*A+1)*(2*B+1)+1)//2
else:
    ans = ((2*A+1)*(2*B+1)-1)//2

ans %= mod
print(ans)