#include <bits/stdc++.h>

template <class T, class U, class AssociativeOp = std::multiplies<>>
constexpr T power(T a, U n, T init = 1, AssociativeOp op = AssociativeOp{}) {
  static_assert(std::is_integral_v<U> and not std::is_same_v<U, bool>);
  assert(n >= 0);
  while (n) {
    if (n & 1) init = op(init, a);
    if (n >>= 1) a = op(a, a);
  }
  return init;
}

template <uint32_t Modulus>
class ModularInt {
  using M = ModularInt;

 public:
  static_assert(int(Modulus) >= 1, "Modulus must be in the range [1, 2^31)");
  static constexpr int modulus() { return Modulus; }
  static M raw(uint32_t v) {
    M res;
    return res.v_ = v, res;
  }

  ModularInt() : v_(0) {}
  ModularInt(int64_t v) : v_((v %= Modulus) < 0 ? v + Modulus : v) {}

  explicit operator int() const { return v_; }
  M& operator++() { return v_ = ++v_ == Modulus ? 0 : v_, *this; }
  M& operator--() { return --(v_ ? v_ : v_ = Modulus), *this; }
  M operator+() const { return *this; }
  M operator-() const { return raw(v_ ? Modulus - v_ : 0); }
  M& operator*=(M o) { return v_ = uint64_t(v_) * o.v_ % Modulus, *this; }
  M& operator/=(M o) {
    auto [inv, gcd] = extgcd(o.v_, Modulus);
    assert(gcd == 1);
    return *this *= inv;
  }
  M& operator+=(M o) {
    return v_ = int(v_ += o.v_ - Modulus) < 0 ? v_ + Modulus : v_, *this;
  }
  M& operator-=(M o) {
    return v_ = int(v_ -= o.v_) < 0 ? v_ + Modulus : v_, *this;
  }

  friend M operator++(M& a, int) { return std::exchange(a, ++M(a)); }
  friend M operator--(M& a, int) { return std::exchange(a, --M(a)); }
  friend M operator*(M a, M b) { return a *= b; }
  friend M operator/(M a, M b) { return a /= b; }
  friend M operator+(M a, M b) { return a += b; }
  friend M operator-(M a, M b) { return a -= b; }
  friend std::istream& operator>>(std::istream& is, M& x) {
    int64_t v;
    return is >> v, x = v, is;
  }
  friend std::ostream& operator<<(std::ostream& os, M x) { return os << x.v_; }
  friend bool operator==(M a, M b) { return a.v_ == b.v_; }
  friend bool operator!=(M a, M b) { return a.v_ != b.v_; }

 private:
  static std::array<int, 2> extgcd(int a, int b) {
    std::array x{1, 0};
    while (b) std::swap(x[0] -= a / b * x[1], x[1]), std::swap(a %= b, b);
    return {x[0], a};
  }

  uint32_t v_;
};

#pragma region my_template

struct Rep {
  struct I {
    int i;
    void operator++() { ++i; }
    int operator*() const { return i; }
    bool operator!=(I o) const { return i < *o; }
  };
  const int l, r;
  Rep(int _l, int _r) : l(_l), r(_r) {}
  Rep(int n) : Rep(0, n) {}
  I begin() const { return {l}; }
  I end() const { return {r}; }
};
struct Per {
  struct I {
    int i;
    void operator++() { --i; }
    int operator*() const { return i; }
    bool operator!=(I o) const { return i > *o; }
  };
  const int l, r;
  Per(int _l, int _r) : l(_l), r(_r) {}
  Per(int n) : Per(0, n) {}
  I begin() const { return {r - 1}; }
  I end() const { return {l - 1}; }
};

template <class F>
struct Fix : private F {
  Fix(F f) : F(f) {}
  template <class... Args>
  decltype(auto) operator()(Args&&... args) const {
    return F::operator()(*this, std::forward<Args>(args)...);
  }
};

template <class T = int>
T scan() {
  T res;
  std::cin >> res;
  return res;
}

template <class T, class U = T>
bool chmin(T& a, U&& b) {
  return b < a ? a = std::forward<U>(b), true : false;
}
template <class T, class U = T>
bool chmax(T& a, U&& b) {
  return a < b ? a = std::forward<U>(b), true : false;
}

#ifndef LOCAL
#define DUMP(...) void(0)
template <int OnlineJudge, int Local>
constexpr int OjLocal = OnlineJudge;
#endif

using namespace std;

#define ALL(c) begin(c), end(c)

#pragma endregion

#define rep(i, a, b) for (int i = a; i < int(b); ++i)
using ll = long long;

ll modLog(ll a, ll b, ll m) {
  ll n = (ll)sqrt(m) + 1, e = 1, f = 1, j = 1;
  unordered_map<ll, ll> A;
  while (j <= n && (e = f = e * a % m) != b % m) A[e * b % m] = j++;
  if (e == b % m) return j;
  if (__gcd(m, e) == __gcd(m, b))
    rep(i, 2, n + 2) if (A.count(e = e * f % m)) return n * i - A[e];
  return -1;
}

using Mint7 = ModularInt<int(1e9) + 7>;
using Mint6 = ModularInt<int(1e9) + 6>;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  cout << fixed << setprecision(20);
  for (int tt = scan(); tt--;) {
    int x = scan(), k = scan();
    Mint6 logx = modLog(5, x, int(1e9) + 7);
    cout << (x ? power<Mint7>(5, int(logx / k)) : 0) << '\n';
  }
}