#include <bits/stdc++.h>
using namespace std;
const int MOD = (int)1e9 + 7;
const double EPS = 1e-9;
const int INF = INT_MAX;
const long long INFLL = (long long)1e18;
const double PI = acos(-1.0);
template <class T>
T gcd(T a, T b) {
  return b ? gcd(b, a % b) : a;
}
template <class T>
T lcm(T a, T b) {
  return a / gcd(a, b) * b;
}
const int N = (int)1e6 + 5;
const int P = 1 << 18;
int n;
int f[N];
vector<int> F[11];
int next(int x) {
  int res = 1;
  while (x > 0) {
    if (x % 10 != 0) res *= (x % 10);
    x /= 10;
  }
  return res;
}
int go(int x) {
  while (x >= 10) {
    x = next(x);
  }
  return x;
}
void precalc() {
  for (int i = 1; i <= 1000000; i++) {
    F[go(i)].push_back(i);
  }
}
int main() {
  ios::sync_with_stdio(false);
  cout.setf(ios::fixed | ios::showpoint);
  cout.precision(8);
  precalc();
  cin >> n;
  while (n--) {
    int l, r, k;
    cin >> l >> r >> k;
    int L = 0, R = F[k].size() - 1;
    int L2 = 0, R2 = F[k].size() - 1;
    while (R - L > 1) {
      int mid = (L + R) / 2;
      if (F[k][mid] >= l)
        R = mid;
      else
        L = mid;
    }
    while (R2 - L2 > 1) {
      int mid = (L2 + R2) / 2;
      if (F[k][mid] <= r)
        L2 = mid;
      else
        R2 = mid;
    }
    if (F[k][L] >= l) R = L;
    if (F[k][R2] <= r) L2 = R2;
    if (F[k][L2] > r) L2 = -1;
    if (F[k][R] < l) R = 10000000;
    if (L2 < R)
      cout << "0\n";
    else
      cout << L2 - R + 1 << endl;
  }
  return 0;
}
