#include <bits/stdc++.h>
#include <atcoder/all>
#define rep(i, n) for (int i = 0; i < n; i++)
#define ALL(a) a.begin(), a.end()
#define ll long long
using namespace std;
using namespace atcoder;
ll ten[11];
ll f(ll r, ll k, ll c)
{
	ll ans = 0;
	rep(i, 9)
	{
		ans += floor_sum(r, ten[i + 1], k, ten[i + 1] - c * ten[i] + k);
		ans -= floor_sum(r, ten[i + 1], k, k);
	}
	return ans;
}
void solve()
{
	ll l, r, k, c;
	cin >> l >> r >> k >> c;
	l = (l - 1) / k;
	r = r / k;
	ll ans = f(r, k, c) - f(r, k, c + 1) - f(l, k, c) + f(l, k, c + 1);
	cout << ans << '\n';
}
int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cout << fixed << setprecision(13);
	ten[0] = 1;
	rep(i, 10) ten[i + 1] = 10 * ten[i];
	int t;
	cin >> t;
	rep(i, t) solve();
	return 0;
}