#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1000000007;
const long long HALF = 500000004;
const long long ONE_SIXTH = 166666668;
long long sum1(long long N){
  N %= MOD;
  return N * (N + 1) % MOD * HALF % MOD;
}
long long sum2(long long N){
  N %= MOD;
  return N * (N + 1) % MOD * (N * 2 + 1) % MOD * ONE_SIXTH % MOD;
}
int main(){
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    long long a, N;
    cin >> a >> N;
    long long mx = sqrt(a * N);
    long long ans = N % MOD * mx % MOD;
    for (int j = 0; j < a; j++){
      long long q = (mx - j) / a;
      ans += MOD - sum2(q) * a % MOD;
      ans += MOD - sum1(q) * j * 2 % MOD;
      if (j != 0){
        q++;
      }
      long long s;
      if (j == 0 && a > 1){
        s = MOD - 1;
      } else {
        s = ((long long) j * j - 1) / a % MOD;
      }
      ans += MOD - s * q % MOD;
    }
    ans %= MOD;
    cout << ans << endl;
  }
}