#include<bits/stdc++.h>
using namespace std;
#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
typedef long double ld;
typedef complex<double> comp;
const ll INF=1e9+7;
const ll inf=INF*INF;
const ll MOD=1e9+7;
const ll mod=MOD;
const int MAX=1000010;
const double PI=acos(-1.0);

ll rui(ll a,ll b,ll p){
    ll res=1;
    ll x=a;
    while(b){
        if(b&1)res=res*x%p;
        x=x*x%p;
        b/=2;
    }
    return res;
}

signed main(){
    ll t;cin>>t;
    while(t--){
        ll x,k;cin>>x>>k;
        ll inv=rui(k,mod-4,mod-1);
        ll ans=rui(x,inv,mod);
        cout<<ans<<endl;
    }
}