#include <iostream>
#include <vector>
#include <algorithm>
#include <atcoder/modint>
#include <atcoder/fenwicktree>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<(int)(n); i++)

using m32 = atcoder::static_modint<1000000007>;


i64 isqrt(i64 x){
    i64 l = 0, r = 2001001001;
    while(l + 1 < r){
        i64 m = (l+r) / 2;
        if(m * m <= x) l = m; else r = m;
    }
    return l;
}

const m32 inv2 = m32(2).inv();
const m32 inv6 = m32(6).inv();

m32 linear_sum(i64 x){
    return m32(x) * (m32(x)+1) * inv2;
}
m32 square_sum(i64 x){
    return m32(x) * (m32(x)+1) * (m32(x)*2+1) * inv6;
}

// sum_{i=0}^N ceil(i*i/a)
m32 solve2(i64 a, i64 N){
    //cout << "a = " << a << " , N = " << N << endl;
    m32 ans = 0;
    for(i64 b=0; b<a; b++) if(b <= N){
        i64 n = (N-b) / a;
        ans += square_sum(n) * a + linear_sum(n) * b * 2 + m32((b*b+a-1)/a)*(n+1);
    }
    return ans - N;
}

m32 solve(){
    i64 a, N; cin >> a >> N;
    i64 n = isqrt(a * N);
    m32 grid = m32(n) * m32(N);
    return grid - solve2(a, n);
}

int main(){
    int T; cin >> T;
    rep(t,T) cout << solve().val() << '\n';
    return 0;
}

struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;