#include <cstdio>
typedef long long ll;
const int MOD = 1000000007;
ll modpow(ll a, ll x) {
ll ret = 1;
a = a % MOD;
while (x) {
if (x & 1) ret = ret * a % MOD;
a = a * a % MOD;
x >>= 1;
}
return ret;
}
int main() {
ll h, w;
scanf("%lld%lld", &h, &w);
h %= MOD;
w %= MOD;
ll cntH, cntW;
cntH = ((h * (h+1)) >> 1) % MOD;
cntW = ((w * (w+1)) >> 1) % MOD;
ll expH, expW;
expH = h * (h+1) % MOD * (h+2) % MOD * modpow(6, MOD-2) % MOD;
expW = w * (w+1) % MOD * (w+2) % MOD * modpow(6, MOD-2) % MOD;
ll res = expH * expW % MOD * 9 % MOD;
res = res * modpow(cntH * cntW, MOD-2) % MOD;
printf("%lld\n", res);
return 0;
}
