#include <bits/stdc++.h>
using namespace std;
#define LOCAL
#pragma region Macros
typedef long long ll;
#define ALL(x) (x).begin(),(x).end()
const long long MOD=1000000007;
// const long long MOD=998244353;
const int INF=1e9;
const long long IINF=1e18;
const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
const char dir[4]={'D','R','U','L'};

template<typename T>
istream &operator>>(istream &is,vector<T> &v){
    for (T &x:v) is >> x;
    return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &v){
    for (int i=0;i<v.size();++i){
        os << v[i] << (i+1==v.size()?"": " ");
    }
    return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const pair<T,U> &p){
    os << '(' << p.first << ',' << p.second << ')';
    return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const map<T,U> &m){
    os << '{';
    for (auto itr=m.begin();itr!=m.end();++itr){
        os << '(' << itr->first << ',' << itr->second << ')';
        if (++itr!=m.end()) os << ',';
        --itr;
    }
    os << '}';
    return os;
}
template<typename T>
ostream &operator<<(ostream &os,const set<T> &s){
    os << '{';
    for (auto itr=s.begin();itr!=s.end();++itr){
        os << *itr;
        if (++itr!=s.end()) os << ',';
        --itr;
    }
    os << '}';
    return os;
}

void debug_out(){cerr << '\n';}
template<class Head,class... Tail>
void debug_out(Head&& head,Tail&&... tail){
    cerr << head;
    if (sizeof...(Tail)>0) cerr << ", ";
    debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...) cerr << " ";\
cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\
cerr << " ";\
debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;}
template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;}

template<class T1,class T2> inline bool chmin(T1 &a,T2 b){
    if (a>b){a=b; return true;} return false;
}
template<class T1,class T2> inline bool chmax(T1 &a,T2 b){
    if (a<b){a=b; return true;} return false;
}
#pragma endregion

int64_t mod_log(int64_t a, int64_t b, int64_t p) {
    int64_t g = 1;

    for(int64_t i = p; i; i /= 2) (g *= a) %= p;
    g = __gcd(g, p);

    int64_t t = 1, c = 0;
    for(; t % g; c++) {
        if(t == b) return c;
        (t *= a) %= p;
    }
    if(b % g) return -1;

    t /= g;
    b /= g;

    int64_t n = p / g, h = 0, gs = 1;

    for(; h * h < n; h++) (gs *= a) %= n;

    unordered_map< int64_t, int64_t > bs;
    for(int64_t s = 0, e = b; s < h; bs[e] = ++s) {
        (e *= a) %= n;
    }

    for(int64_t s = 0, e = t; s < n;) {
        (e *= gs) %= n;
        s += h;
        if(bs.count(e)) return c + s - bs[e];
    }
    return -1;
}

long long modpow(long long x,long long n,long long mod){
    long long res=1;
    while (n>0){
        if (n&1LL) res=res*x%mod;
        x=x*x%mod; n>>=1LL;
    }
    return res;
}

constexpr int r=5;

template<typename T>
T euler_phi(T n){
    T res=n;
    for (T i=2;i*i<=n;++i) if (n%i==0){
        res-=res/i;
        while (n%i==0) n/=i;
    }
    if (n!=1) res-=res/n;
    return res;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int T; cin >> T;
    for (;T--;){
        ll X,K; cin >> X >> K;
        if (X==0){
            cout << 0 << '\n';
            return 0;
        }
        ll x=mod_log(r,X,MOD),inv=modpow(K,500000001,MOD-1);
        assert(x>=0);
        (x*=inv)%=(MOD-1);
        ll ans=modpow(r,x,MOD);
        cout << ans << '\n';
    }
}