MOD=10**9+7
A,B=map(int, input().split())
if A%2==0:
    odd0,even0=A,A+1
else:
    odd0,even0=A+1,A
if B%2==0:
    odd1,even1=B,B+1
else:
    odd1,even1=B+1,B
res=odd0*odd1+even0*even1
res%=MOD
print(res)